:root {
            --primary: #e03131;
            --primary-deep: #c62828;
            --primary-soft: #fff5f5;
            --blue-dark: #0b1e33;
            --blue-mid: #0f2b47;
            --blue-light: #132f4c;
            --text-primary: #1a1a2e;
            --text-secondary: #4a5568;
            --text-muted: #64748b;
            --bg-white: #ffffff;
            --bg-slate: #f8fafc;
            --bg-cool: #f0f4f8;
            --border: #e2e8f0;
            --border-light: #edf2f7;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.10);
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background-color: var(--bg-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER ========== */
        .header {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 88px;
            display: flex;
            align-items: center;
            z-index: 100;
            background: transparent;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-sm);
            position: fixed;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            gap: 40px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 21px;
            font-weight: 800;
            color: #0b2b4a;
            letter-spacing: -0.4px;
            white-space: nowrap;
        }
        .logo-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            background: var(--primary);
            border-radius: 50%;
            margin-left: 1px;
            vertical-align: middle;
            position: relative;
            top: -6px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .nav-item {
            font-size: 14.5px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 8px 16px;
            border-radius: 22px;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-item:hover {
            color: #005fa9;
            background: rgba(0, 95, 169, 0.05);
        }
        .nav-item.nav-cta {
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: 24px;
            margin-left: 4px;
        }
        .nav-item.nav-cta:hover {
            background: var(--primary-deep);
            color: #fff;
            box-shadow: 0 4px 14px rgba(224, 49, 49, 0.30);
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            padding: 170px 0 100px;
            background: linear-gradient(155deg, #f5f9fd 0%, #eaf2fa 30%, #f8fafc 60%, #f0f5fb 100%);
            overflow: hidden;
            isolation: isolate;
        }
        .hero::before {
            content: '';
            position: absolute;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle at 55% 45%, rgba(0, 120, 210, 0.06) 0%, transparent 68%);
            top: -120px;
            right: -160px;
            border-radius: 50%;
            z-index: 0;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle at 40% 40%, rgba(224, 49, 49, 0.04) 0%, transparent 65%);
            bottom: -60px;
            left: -80px;
            border-radius: 50%;
            z-index: 0;
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            align-items: center;
            gap: 40px;
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 13.5px;
            color: #005fa9;
            font-weight: 700;
            margin-bottom: 20px;
            background: rgba(0, 95, 169, 0.07);
            padding: 7px 16px;
            border-radius: 20px;
            letter-spacing: 0.2px;
        }
        .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            background: #10b981;
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.6);
            }
        }
        .hero-title {
            font-size: 50px;
            line-height: 1.18;
            font-weight: 850;
            color: #0b1e33;
            margin-bottom: 20px;
            letter-spacing: -0.6px;
        }
        .hero-title .highlight {
            color: #005fa9;
            position: relative;
        }
        .hero-title .highlight::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            width: 100%;
            height: 3px;
            background: rgba(0, 95, 169, 0.25);
            border-radius: 2px;
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 520px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 15px 36px;
            font-size: 15.5px;
            font-weight: 700;
            color: #fff;
            background: var(--primary);
            border-radius: 28px;
            transition: all var(--transition);
            white-space: nowrap;
            border: none;
            cursor: pointer;
            letter-spacing: 0.2px;
        }
        .btn-primary:hover {
            background: var(--primary-deep);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(224, 49, 49, 0.30);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 14px 34px;
            font-size: 15px;
            font-weight: 700;
            color: #005fa9;
            background: transparent;
            border: 2px solid #cbd5e1;
            border-radius: 28px;
            transition: all var(--transition);
            white-space: nowrap;
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: #005fa9;
            background: rgba(0, 95, 169, 0.04);
            transform: translateY(-2px);
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 360px;
        }
        .hero-card-stack {
            position: relative;
            width: 100%;
            max-width: 440px;
            aspect-ratio: 4/3;
        }
        .hero-card {
            position: absolute;
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 28px 24px;
            transition: all 0.4s ease;
        }
        .hero-card.card-main {
            top: 10%;
            left: 5%;
            width: 75%;
            z-index: 3;
            border: 1px solid var(--border-light);
        }
        .hero-card.card-secondary {
            top: 28%;
            right: 0;
            width: 55%;
            z-index: 2;
            opacity: 0.85;
            border: 1px solid var(--border-light);
            transform: rotate(3deg);
        }
        .hero-card.card-tertiary {
            bottom: 8%;
            left: 12%;
            width: 50%;
            z-index: 1;
            opacity: 0.7;
            border: 1px solid var(--border-light);
            transform: rotate(-2deg);
        }
        .hero-card .card-label {
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: #005fa9;
            margin-bottom: 10px;
        }
        .hero-card .card-line {
            height: 8px;
            background: #e8edf3;
            border-radius: 4px;
            margin-bottom: 8px;
            width: 100%;
        }
        .hero-card .card-line.short {
            width: 60%;
        }
        .hero-card .card-line.accent {
            background: #005fa9;
            width: 45%;
            opacity: 0.7;
        }
        .hero-card .card-dots {
            display: flex;
            gap: 6px;
            margin-top: 16px;
        }
        .hero-card .card-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #cbd5e1;
        }
        .hero-card .card-dots span.active {
            background: #10b981;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-slate);
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: #005fa9;
            background: rgba(0, 95, 169, 0.07);
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 36px;
            font-weight: 800;
            color: #0b1e33;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ========== WHY SECTION ========== */
        .why-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .why-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .why-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, #005fa9, #10b981);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .why-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .why-card:hover::before {
            opacity: 1;
        }
        .why-card-icon {
            font-size: 36px;
            margin-bottom: 18px;
            display: block;
            line-height: 1;
        }
        .why-card h3 {
            font-size: 18px;
            font-weight: 750;
            color: #0b1e33;
            margin-bottom: 10px;
            letter-spacing: -0.2px;
        }
        .why-card p {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            text-align: justify;
        }
        .why-card .why-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 650;
            color: #005fa9;
            margin-top: 14px;
            transition: gap var(--transition);
        }
        .why-card .why-link:hover {
            gap: 9px;
            color: #00457c;
        }

        /* ========== PROTOCOL SECTION ========== */
        .protocol-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .protocol-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: #0b1e33;
            margin-bottom: 20px;
            letter-spacing: -0.3px;
        }
        .protocol-content p {
            font-size: 15.5px;
            color: var(--text-secondary);
            margin-bottom: 18px;
            line-height: 1.75;
            text-align: justify;
        }
        .protocol-features {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
            margin: 24px 0;
        }
        .protocol-features li {
            font-size: 14px;
            font-weight: 600;
            color: #0b1e33;
            padding: 12px 16px;
            background: #f8fafc;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .protocol-features li .pf-icon {
            color: #10b981;
            font-weight: 800;
            font-size: 16px;
        }
        .smart-entry {
            background: #fff;
            border: 2px dashed #cbd5e1;
            border-radius: var(--radius);
            padding: 28px 30px;
            margin-top: 28px;
            transition: all var(--transition);
            text-align: center;
        }
        .smart-entry:hover {
            border-color: #005fa9;
            background: #fafcfe;
            box-shadow: var(--shadow-md);
        }
        .smart-entry h3 {
            font-size: 17px;
            font-weight: 700;
            color: #0b1e33;
            margin-bottom: 6px;
        }
        .smart-entry p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 14px;
            text-align: center;
        }
        .smart-entry a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 700;
            color: #005fa9;
            font-size: 14.5px;
            transition: gap var(--transition);
        }
        .smart-entry a:hover {
            gap: 10px;
            color: #00457c;
        }
        .protocol-visual {
            background: linear-gradient(145deg, #f0f4f8, #e8eef5);
            border-radius: var(--radius-xl);
            padding: 40px 30px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            min-height: 380px;
            justify-content: center;
        }
        .proto-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            background: #fff;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            font-size: 13.5px;
            font-weight: 650;
            color: #0b1e33;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition);
        }
        .proto-bar:hover {
            transform: translateX(4px);
        }
        .proto-bar .proto-indicator {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .proto-bar .proto-indicator.green {
            background: #10b981;
            box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
        }
        .proto-bar .proto-indicator.blue {
            background: #005fa9;
            box-shadow: 0 0 8px rgba(0, 95, 169, 0.4);
        }

        /* ========== PLATFORM SECTION ========== */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 20px;
        }
        .platform-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 28px 18px;
            text-align: center;
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .platform-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .platform-card .plat-icon {
            font-size: 40px;
            margin-bottom: 14px;
            display: block;
        }
        .platform-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: #0b1e33;
            margin-bottom: 6px;
        }
        .platform-card p {
            font-size: 12.5px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== TREND SECTION ========== */
        .trend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .trend-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            transition: all var(--transition);
            position: relative;
        }
        .trend-card:hover {
            box-shadow: var(--shadow-xl);
            border-color: transparent;
        }
        .trend-card .trend-num {
            font-size: 48px;
            font-weight: 900;
            color: #e8edf3;
            position: absolute;
            top: 16px;
            right: 22px;
            line-height: 1;
            pointer-events: none;
        }
        .trend-card h4 {
            font-size: 17px;
            font-weight: 750;
            color: #0b1e33;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .trend-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            position: relative;
            z-index: 1;
            text-align: justify;
        }
        .trend-card .trend-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 12px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            position: relative;
            z-index: 1;
        }
        .trend-tag.ai {
            background: #ede9fe;
            color: #6d28d9;
        }
        .trend-tag.speed {
            background: #dbeafe;
            color: #1d4ed8;
        }
        .trend-tag.stable {
            background: #d1fae5;
            color: #065f46;
        }

        /* ========== ENTRY RECOMMEND ========== */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .entry-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 30px 24px;
            transition: all var(--transition);
            text-decoration: none;
            color: inherit;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            cursor: pointer;
        }
        .entry-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            transform: translateY(-3px);
        }
        .entry-card .entry-icon {
            font-size: 32px;
            flex-shrink: 0;
            line-height: 1;
        }
        .entry-card .entry-info h4 {
            font-size: 15.5px;
            font-weight: 700;
            color: #0b1e33;
            margin-bottom: 4px;
        }
        .entry-card .entry-info p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .entry-card .entry-arrow {
            margin-left: auto;
            color: #cbd5e1;
            font-size: 18px;
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .entry-card:hover .entry-arrow {
            color: #005fa9;
            transform: translateX(3px);
        }

        /* ========== CTA BOTTOM ========== */
        .cta-bottom {
            padding: 80px 0;
            background: linear-gradient(145deg, #0b1e33 0%, #0f2b47 40%, #132f4c 100%);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-bottom::before {
            content: '';
            position: absolute;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 120, 210, 0.12) 0%, transparent 70%);
            top: -150px;
            right: -100px;
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-bottom .cta-title {
            font-size: 36px;
            font-weight: 850;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .cta-bottom .cta-desc {
            font-size: 16px;
            color: #94a3b8;
            max-width: 560px;
            margin: 0 auto 34px;
            position: relative;
            z-index: 1;
            line-height: 1.7;
        }
        .cta-bottom .btn-primary {
            position: relative;
            z-index: 1;
            font-size: 16px;
            padding: 16px 44px;
        }

        /* ========== FOOTER ========== */
        .footer {
            padding: 44px 0;
            background: #080e16;
            border-top: 1px solid #1e293b;
            color: #64748b;
            font-size: 13.5px;
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .footer-links {
            display: flex;
            gap: 22px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: #94a3b8;
            transition: color var(--transition);
            font-weight: 500;
        }
        .footer-links a:hover {
            color: #cbd5e1;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1100px) {
            .header {
                position: relative;
                height: auto;
                padding: 16px 0;
                background: #fff;
                border-bottom: 1px solid var(--border-light);
            }
            .header-inner {
                flex-direction: column;
                gap: 14px;
            }
            .nav-list {
                gap: 4px;
            }
            .nav-item {
                font-size: 13px;
                padding: 6px 12px;
            }
            .hero {
                padding: 60px 0 60px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 30px;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-subtitle {
                margin: 0 auto 28px;
                max-width: 100%;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-visual {
                min-height: 240px;
            }
            .hero-card-stack {
                max-width: 300px;
                aspect-ratio: auto;
                height: 220px;
            }
            .why-grid,
            .trend-grid,
            .entry-grid {
                grid-template-columns: 1fr;
            }
            .platform-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .protocol-layout {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .protocol-features {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
        }
        @media (max-width: 640px) {
            .platform-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-title {
                font-size: 28px;
            }
            .section-title {
                font-size: 26px;
            }
            .cta-bottom .cta-title {
                font-size: 26px;
            }
            .hero-card-stack {
                height: 160px;
                max-width: 240px;
            }
            .hero-card {
                padding: 16px 14px;
            }
            .hero-card .card-label {
                font-size: 10px;
            }
            .hero-card .card-line {
                height: 5px;
                margin-bottom: 5px;
            }
        }