:root {
            --primary: #0066ff;
            --primary-light: #3b82f6;
            --primary-dark: #1e40af;
            --accent: #14b8a6;
            --accent-green: #10b981;
            --text: #0f172a;
            --text-secondary: #334155;
            --text-muted: #64748b;
            --bg: #ffffff;
            --bg-soft: #f8fafc;
            --bg-card: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.07), 0 1px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.05);
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            color: var(--text);
            background-color: var(--bg);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image:
                radial-gradient(ellipse at 10% 10%, rgba(0, 102, 255, 0.03) 0%, transparent 50%),
                radial-gradient(ellipse at 90% 85%, rgba(20, 184, 166, 0.03) 0%, transparent 50%);
            background-attachment: fixed;
        }

        /* ========== HEADER ========== */
        header {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: box-shadow var(--transition);
        }
        header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .nav-container {
            max-width: 1240px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 14px 24px;
            gap: 16px;
        }

        .logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.02em;
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.82;
        }
        .logo img {
            height: 34px;
            width: auto;
            display: block;
            flex-shrink: 0;
        }
        .logo-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
            margin-left: 2px;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 0.5;
                transform: scale(1);
            }
            50% {
                opacity: 1;
                transform: scale(1.6);
            }
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 6px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(0, 102, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(0, 102, 255, 0.10);
            font-weight: 600;
        }
        .nav-links .nav-badge {
            display: inline-block;
            background: var(--accent-green);
            color: #fff;
            font-size: 0.68rem;
            padding: 2px 7px;
            border-radius: 10px;
            margin-left: 4px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .nav-platform {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb {
            max-width: 1240px;
            margin: 18px auto 0;
            padding: 0 24px;
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            user-select: none;
            opacity: 0.5;
        }

        /* ========== MAIN CONTAINER ========== */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 32px 24px 48px;
        }

        /* ========== HERO ========== */
        .hero {
            text-align: center;
            padding: 60px 28px 56px;
            background: linear-gradient(165deg, #eff6ff 0%, #f0fdfa 35%, #ffffff 100%);
            border-radius: var(--radius-lg);
            margin-bottom: 44px;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -30px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(0, 102, 255, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -40px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(20, 184, 166, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero>* {
            position: relative;
            z-index: 1;
        }
        .hero .icon-row {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .hero .icon-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border: 1px solid var(--border);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            box-shadow: var(--shadow-sm);
        }
        .hero h1 {
            font-size: clamp(1.9rem, 4.5vw, 3rem);
            margin-bottom: 16px;
            color: #0f172a;
            letter-spacing: -0.03em;
            line-height: 1.25;
            font-weight: 800;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 740px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .hero .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 13px 28px;
            border-radius: 28px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.98rem;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(0, 102, 255, 0.30);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 22px rgba(0, 102, 255, 0.40);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: #fff;
            color: var(--primary);
            border: 2px solid var(--border);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(0, 102, 255, 0.04);
            transform: translateY(-1px);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(20, 184, 166, 0.30);
        }
        .btn-accent:hover {
            background: #0d9488;
            box-shadow: 0 6px 20px rgba(20, 184, 166, 0.40);
            transform: translateY(-1px);
        }

        /* ========== SECTION TITLES ========== */
        .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            margin: 44px 0 18px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--border-light);
            letter-spacing: -0.02em;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-title .emoji-mark {
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin: -8px 0 22px;
            max-width: 700px;
        }

        /* ========== CONTENT BOX ========== */
        .content-box {
            margin-bottom: 28px;
            background: var(--bg);
            border-radius: var(--radius);
            padding: 28px 30px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .content-box:hover {
            box-shadow: var(--shadow-md);
        }
        .content-box p {
            margin-bottom: 14px;
            text-align: justify;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .content-box p:last-child {
            margin-bottom: 0;
        }

        /* ========== FEATURE GRID ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 22px;
            margin-top: 16px;
        }
        .feature-card {
            background: var(--bg-card);
            padding: 26px 24px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: #cbd5e1;
        }
        .feature-card:hover::after {
            opacity: 1;
        }
        .feature-card h3 {
            margin-bottom: 10px;
            color: #0f172a;
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
            margin: 0;
            text-align: left;
        }
        .feature-card .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(0, 102, 255, 0.10);
            margin-bottom: 14px;
            font-size: 1.4rem;
        }

        /* ========== FLOW VISUAL ========== */
        .flow-visual {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: center;
            padding: 20px 10px;
            margin: 16px 0;
            font-family: var(--font-mono);
            font-size: 0.9rem;
        }
        .flow-node {
            background: #fff;
            border: 2px dashed var(--border);
            border-radius: 28px;
            padding: 10px 20px;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
            transition: all var(--transition);
        }
        .flow-node.core {
            border-style: solid;
            border-color: var(--primary);
            background: rgba(0, 102, 255, 0.05);
            color: var(--primary);
            font-weight: 700;
        }
        .flow-arrow {
            font-size: 1.4rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        /* ========== STAT ROW ========== */
        .stat-row {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin: 24px 0;
        }
        .stat-item {
            text-align: center;
            min-width: 100px;
        }
        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.03em;
            line-height: 1;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== BADGE / TAG ========== */
        .badge {
            display: inline-block;
            background: #e0f2fe;
            color: #0369a1;
            padding: 3px 10px;
            border-radius: 14px;
            font-size: 0.82rem;
            font-weight: 600;
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .badge-green {
            background: #d1fae5;
            color: #065f46;
        }
        .badge-blue {
            background: #dbeafe;
            color: #1e40af;
        }

        /* ========== LIST STYLE ========== */
        .styled-list {
            list-style: none;
            padding: 0;
            margin: 12px 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 10px;
        }
        .styled-list li {
            padding: 10px 14px;
            background: var(--bg-soft);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--primary-light);
            font-size: 0.93rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .styled-list li:hover {
            border-left-color: var(--accent);
            background: #f0fdfa;
        }
        .styled-list li strong {
            color: var(--text);
        }

        /* ========== CTA STRIP ========== */
        .cta-strip {
            text-align: center;
            background: linear-gradient(135deg, #eff6ff 0%, #ecfdf5 100%);
            border-radius: var(--radius-lg);
            padding: 44px 24px;
            margin-top: 36px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .cta-strip h3 {
            font-size: 1.5rem;
            margin-bottom: 10px;
            color: #0f172a;
            letter-spacing: -0.02em;
        }
        .cta-strip p {
            color: var(--text-secondary);
            margin-bottom: 22px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-strip .btn-row {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== PREVIEW BLOCK ========== */
        .preview-block {
            text-align: center;
            background: var(--bg-soft);
            border-radius: var(--radius);
            padding: 36px 20px;
            border: 1px solid var(--border);
            margin-top: 10px;
        }
        .preview-block img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition);
        }
        .preview-block img:hover {
            transform: scale(1.01);
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 18px;
            margin-top: 18px;
        }
        .scenario-card {
            background: #fff;
            padding: 22px 18px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .scenario-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .scenario-card .sc-icon {
            font-size: 2rem;
            margin-bottom: 8px;
        }
        .scenario-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: #0f172a;
        }
        .scenario-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ========== WHY-CLASH TABLE ========== */
        .why-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 18px;
            margin-top: 12px;
        }
        .why-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 16px;
            background: var(--bg-soft);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
        }
        .why-icon {
            font-size: 1.8rem;
            flex-shrink: 0;
            width: 40px;
            text-align: center;
        }
        .why-text h4 {
            font-weight: 700;
            margin-bottom: 4px;
            color: #0f172a;
        }
        .why-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ========== FOOTER ========== */
        footer {
            background: var(--bg-soft);
            text-align: center;
            padding: 36px 20px;
            margin-top: 56px;
            border-top: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.8;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            list-style: none;
            gap: 18px;
            margin-bottom: 14px;
            flex-wrap: wrap;
        }
        .footer-links a {
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 500;
            transition: color var(--transition);
            font-size: 0.9rem;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-note {
            font-size: 0.78rem;
            color: #94a3b8;
            margin-top: 6px;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 768px) {
            .nav-container {
                flex-direction: column;
                gap: 10px;
                padding: 12px 16px;
            }
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 7px 11px;
                font-size: 0.85rem;
            }
            .hero {
                padding: 36px 16px 32px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.9rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .content-box {
                padding: 20px 16px;
            }
            .feature-grid,
            .scenario-grid,
            .why-grid {
                grid-template-columns: 1fr;
            }
            .styled-list {
                grid-template-columns: 1fr;
            }
            .footer-links {
                gap: 10px;
            }
            .flow-visual {
                gap: 6px;
                font-size: 0.78rem;
            }
            .flow-node {
                padding: 7px 13px;
                font-size: 0.8rem;
            }
            .flow-arrow {
                font-size: 1rem;
            }
        }

        @media (max-width: 420px) {
            .hero .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
            .stat-num {
                font-size: 1.6rem;
            }
            .hero h1 {
                font-size: 1.4rem;
            }
        }