:root {
            /* 深色背景体系 */
            --bg-deepest: #060b10;
            --bg-deep: #0a1018;
            --bg-surface: #0f1822;
            --bg-card: #141e2b;
            --bg-card-hover: #192638;
            --bg-elevated: #1b2a3a;

            /* 青蓝强调色 */
            --cyan-400: #22d3ee;
            --cyan-500: #06b6d4;
            --cyan-600: #0891b2;
            --cyan-700: #0e7490;
            --cyan-glow: rgba(6, 182, 212, 0.35);

            /* 紫色渐变点缀 */
            --purple-400: #a78bfa;
            --purple-500: #8b5cf6;
            --purple-600: #7c3aed;
            --purple-glow: rgba(139, 92, 246, 0.3);

            /* 文字层级 */
            --text-primary: #e8edf3;
            --text-secondary: #bcc8d4;
            --text-muted: #7d8f9f;
            --text-dim: #5a6b7a;

            /* 边框与分割 */
            --border-subtle: rgba(56, 189, 248, 0.08);
            --border-card: rgba(56, 189, 248, 0.12);
            --border-glow: rgba(6, 182, 212, 0.25);

            /* 圆角 */
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --radius-full: 9999px;

            /* 阴影 */
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-card-hover: 0 12px 36px rgba(6, 182, 212, 0.12), 0 2px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow-cyan: 0 0 40px rgba(6, 182, 212, 0.2);
            --shadow-glow-purple: 0 0 40px rgba(139, 92, 246, 0.18);

            /* 过渡 */
            --ease-out: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --ease-spring: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background: var(--bg-deepest);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            background-image:
                radial-gradient(ellipse at 20% 10%, rgba(6, 182, 212, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 75% 40%, rgba(139, 92, 246, 0.03) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
            background-attachment: fixed;
        }

        .container {
            max-width: 1260px;
            margin: 0 auto;
            padding: 0 22px;
        }

        /* ==================== HEADER ==================== */
        header {
            background: rgba(10, 16, 24, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-subtle);
            box-shadow: 0 1px 0 rgba(6, 182, 212, 0.04);
            transition: var(--ease-out);
        }

        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 12px 0;
            gap: 12px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--cyan-500), var(--purple-500));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            color: #fff;
            letter-spacing: -0.5px;
            box-shadow: 0 0 18px var(--cyan-glow);
            transition: var(--ease-spring);
        }
        .logo-area:hover .logo-icon {
            box-shadow: 0 0 28px var(--purple-glow);
            transform: scale(1.04);
        }

        .logo-text {
            font-weight: 720;
            font-size: 1.35rem;
            letter-spacing: -0.3px;
            background: linear-gradient(135deg, #e8edf3 0%, #38bdf8 50%, #a78bfa 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            gap: 4px;
            align-items: center;
            flex-wrap: wrap;
            list-style: none;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--ease-out);
            font-size: 0.88rem;
            padding: 7px 13px;
            border-radius: 22px;
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.1px;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--cyan-400);
            background: rgba(6, 182, 212, 0.08);
        }
        .nav-links a.active {
            font-weight: 620;
            background: rgba(6, 182, 212, 0.13);
            box-shadow: inset 0 0 0 1px rgba(6, 182, 212, 0.2);
        }
        .nav-download-btn {
            background: linear-gradient(135deg, var(--cyan-600), var(--cyan-500));
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 28px;
            font-weight: 600;
            transition: var(--ease-spring);
            box-shadow: 0 0 16px var(--cyan-glow);
            letter-spacing: 0.2px;
        }
        .nav-download-btn:hover {
            background: linear-gradient(135deg, var(--cyan-500), #22d3ee);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.5);
            transform: translateY(-2px);
            color: #fff !important;
        }

        /* ==================== HERO ==================== */
        .hero {
            display: flex;
            flex-wrap: wrap;
            align-items: stretch;
            justify-content: space-between;
            padding: 44px 0 32px;
            gap: 30px;
        }
        .hero-left {
            flex: 1.3;
            min-width: 280px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .hero-badge {
            background: rgba(6, 182, 212, 0.1);
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 7px 15px;
            border-radius: 28px;
            font-size: 0.8rem;
            font-weight: 580;
            color: var(--cyan-400);
            margin-bottom: 16px;
            width: fit-content;
            border: 1px solid rgba(6, 182, 212, 0.2);
            letter-spacing: 0.3px;
            animation: subtlePulse 3s ease-in-out infinite;
        }
        @keyframes subtlePulse {
            0%,
            100% {
                box-shadow: 0 0 8px rgba(6, 182, 212, 0.1);
            }
            50% {
                box-shadow: 0 0 20px rgba(6, 182, 212, 0.25);
            }
        }
        .hero-left h1 {
            font-size: clamp(2rem, 4.2vw, 3.2rem);
            font-weight: 820;
            line-height: 1.16;
            background: linear-gradient(150deg, #e0e8f2 0%, #38bdf8 40%, #a78bfa 75%, #c4b5fd 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }
        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 580px;
            margin-bottom: 8px;
            font-weight: 440;
            line-height: 1.55;
        }
        .hero-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            max-width: 560px;
            margin-bottom: 22px;
            line-height: 1.6;
        }
        .hero-platforms {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
        }
        .platform-tag {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            padding: 5px 12px;
            border-radius: 22px;
            font-size: 0.78rem;
            font-weight: 520;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--ease-out);
            white-space: nowrap;
        }
        .platform-tag:hover {
            border-color: var(--cyan-500);
            background: rgba(6, 182, 212, 0.08);
            color: var(--cyan-400);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.15);
        }
        .hero-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 18px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--cyan-600), var(--cyan-500));
            color: #fff;
            padding: 12px 26px;
            border-radius: 36px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--ease-spring);
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 0.95rem;
            box-shadow: 0 0 22px var(--cyan-glow);
            border: none;
            cursor: pointer;
            letter-spacing: 0.1px;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--cyan-500), #22d3ee);
            transform: translateY(-3px);
            box-shadow: 0 0 36px rgba(6, 182, 212, 0.5);
        }
        .btn-outline {
            background: transparent;
            border: 1.6px solid rgba(6, 182, 212, 0.5);
            color: var(--cyan-400);
            padding: 11px 24px;
            border-radius: 36px;
            text-decoration: none;
            font-weight: 580;
            transition: var(--ease-spring);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.94rem;
        }
        .btn-outline:hover {
            background: rgba(6, 182, 212, 0.07);
            border-color: var(--cyan-400);
            color: #38bdf8;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
            transform: translateY(-2px);
        }
        .hero-stats-mini {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .hero-stats-mini strong {
            color: var(--cyan-400);
            font-size: 1.2rem;
            font-weight: 720;
            display: block;
            line-height: 1.2;
            letter-spacing: -0.2px;
        }

        .hero-right {
            flex: 0.8;
            min-width: 250px;
            background: var(--bg-card);
            padding: 26px 22px;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-card);
            gap: 8px;
            position: relative;
            overflow: hidden;
        }
        .hero-right::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -30%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-right .shield-icon {
            font-size: 4rem;
            line-height: 1;
            position: relative;
            z-index: 1;
        }
        .hero-right h3 {
            color: #e0e8f2;
            font-weight: 680;
            font-size: 1.2rem;
            position: relative;
            z-index: 1;
        }
        .hero-right p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.5;
            position: relative;
            z-index: 1;
        }
        .hero-right .tg-badge {
            background: rgba(6, 182, 212, 0.08);
            border-radius: 24px;
            padding: 8px 15px;
            font-size: 0.82rem;
            font-weight: 540;
            color: var(--cyan-400);
            border: 1px solid rgba(6, 182, 212, 0.2);
            position: relative;
            z-index: 1;
        }

        /* ==================== SECTION TITLES ==================== */
        .section-title {
            text-align: center;
            font-size: clamp(1.6rem, 2.8vw, 2.1rem);
            font-weight: 720;
            margin-bottom: 8px;
            color: #e0e8f2;
            letter-spacing: -0.2px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 36px;
            font-size: 0.9rem;
            line-height: 1.55;
        }
        .accent-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--cyan-500);
            box-shadow: 0 0 10px var(--cyan-glow);
            margin: 0 6px;
            vertical-align: middle;
            position: relative;
            top: -1px;
        }
        .accent-dot.purple {
            background: var(--purple-500);
            box-shadow: 0 0 10px var(--purple-glow);
        }

        /* ==================== 三大入口导航区 ==================== */
        .gateway-section {
            padding: 36px 0;
        }
        .gateway-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }
        .gateway-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
            display: flex;
            flex-direction: column;
            gap: 10px;
            position: relative;
            overflow: hidden;
            text-decoration: none;
            color: inherit;
            cursor: pointer;
        }
        .gateway-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--cyan-500), var(--purple-500), transparent);
            opacity: 0;
            transition: var(--ease-out);
            border-radius: 0 0 2px 2px;
        }
        .gateway-card:hover::after {
            opacity: 1;
        }
        .gateway-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            background: var(--bg-card-hover);
        }
        .gateway-card .gw-icon {
            font-size: 2.6rem;
            line-height: 1;
        }
        .gateway-card h3 {
            font-size: 1.15rem;
            font-weight: 680;
            color: #e0e8f2;
            margin: 0;
        }
        .gateway-card .gw-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
            flex-grow: 1;
        }
        .gateway-card .gw-features {
            display: flex;
            flex-wrap: wrap;
            gap: 5px;
            font-size: 0.72rem;
            color: var(--text-dim);
        }
        .gw-features span {
            background: rgba(6, 182, 212, 0.06);
            padding: 3px 9px;
            border-radius: 14px;
            white-space: nowrap;
            border: 1px solid rgba(6, 182, 212, 0.1);
        }
        .gateway-card .gw-link-text {
            color: var(--cyan-400);
            font-weight: 600;
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: var(--ease-out);
        }
        .gateway-card:hover .gw-link-text {
            gap: 9px;
            color: #38bdf8;
        }
        .gateway-card.card-purple:hover {
            border-color: rgba(139, 92, 246, 0.35);
            box-shadow: 0 12px 36px rgba(139, 92, 246, 0.1), 0 2px 16px rgba(0, 0, 0, 0.4);
        }
        .gateway-card.card-purple .gw-link-text {
            color: var(--purple-400);
        }
        .gateway-card.card-purple:hover .gw-link-text {
            color: #c4b5fd;
        }

        /* ==================== 体验升级区 ==================== */
        .upgrade-section {
            padding: 36px 0;
        }
        .upgrade-wrapper {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 22px;
        }
        .upgrade-compare {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
        }
        .upgrade-compare:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .upgrade-compare h4 {
            font-size: 1rem;
            font-weight: 680;
            color: #e0e8f2;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .upgrade-compare .section-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--text-dim);
            margin-bottom: 10px;
            display: block;
        }
        .upgrade-compare ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .upgrade-compare ul li {
            padding: 6px 0;
            font-size: 0.84rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.4;
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
        }
        .upgrade-compare ul li:last-child {
            border-bottom: none;
        }
        .li-icon {
            flex-shrink: 0;
            width: 18px;
            text-align: center;
            font-size: 0.8rem;
        }
        .li-icon.bad {
            color: #f87171;
        }
        .li-icon.good {
            color: #34d399;
        }

        /* ==================== 多客户端生态 ==================== */
        .ecosystem-section {
            padding: 36px 0;
        }
        .eco-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
        }
        .eco-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
            display: flex;
            flex-direction: column;
            gap: 7px;
            text-decoration: none;
            color: inherit;
            cursor: pointer;
        }
        .eco-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .eco-card h4 {
            font-size: 1rem;
            font-weight: 650;
            color: #e0e8f2;
            margin: 0;
        }
        .eco-card .eco-platform {
            font-size: 0.7rem;
            color: var(--text-dim);
            background: rgba(6, 182, 212, 0.06);
            display: inline-block;
            padding: 2px 8px;
            border-radius: 12px;
            width: fit-content;
            border: 1px solid rgba(6, 182, 212, 0.1);
        }
        .eco-card .eco-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.45;
            flex-grow: 1;
        }
        .eco-card .eco-link {
            color: var(--cyan-400);
            font-weight: 550;
            font-size: 0.82rem;
            transition: var(--ease-out);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .eco-card:hover .eco-link {
            color: #38bdf8;
            gap: 7px;
        }

        /* ==================== 快速教程 ==================== */
        .quick-guide-section {
            padding: 36px 0;
        }
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 14px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
            text-decoration: none;
            color: inherit;
            cursor: pointer;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .guide-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .guide-card h4 {
            font-size: 0.95rem;
            font-weight: 650;
            color: #e0e8f2;
        }
        .guide-card p {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.4;
            flex-grow: 1;
        }
        .guide-card .guide-arrow {
            color: var(--cyan-400);
            font-weight: 600;
            font-size: 0.82rem;
            transition: var(--ease-out);
        }
        .guide-card:hover .guide-arrow {
            color: #38bdf8;
        }

        /* ==================== 长文专题区 ==================== */
        .insight-section {
            padding: 36px 0;
        }
        .insight-card {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: 32px 26px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
            box-shadow: var(--shadow-card);
        }
        .insight-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
        }
        .insight-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #e0e8f2;
            margin-bottom: 14px;
            letter-spacing: -0.2px;
        }
        .insight-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .insight-card .protocol-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 14px;
        }
        .protocol-tag-item {
            background: rgba(6, 182, 212, 0.07);
            border: 1px solid rgba(6, 182, 212, 0.18);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 540;
            color: var(--cyan-400);
            white-space: nowrap;
            transition: var(--ease-out);
        }
        .protocol-tag-item:hover {
            background: rgba(6, 182, 212, 0.14);
            box-shadow: 0 0 14px rgba(6, 182, 212, 0.2);
        }
        .protocol-tag-item.purple-tag {
            background: rgba(139, 92, 246, 0.07);
            border-color: rgba(139, 92, 246, 0.18);
            color: var(--purple-400);
        }
        .protocol-tag-item.purple-tag:hover {
            background: rgba(139, 92, 246, 0.14);
            box-shadow: 0 0 14px rgba(139, 92, 246, 0.2);
        }

        /* ==================== FAQ ==================== */
        .faq-section {
            padding: 36px 0;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
            cursor: default;
        }
        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            background: var(--bg-card-hover);
        }
        .faq-item h4 {
            font-size: 0.95rem;
            font-weight: 650;
            color: #e0e8f2;
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .faq-item h4 .faq-q {
            color: var(--cyan-400);
            font-weight: 700;
            flex-shrink: 0;
        }
        .faq-item p {
            font-size: 0.84rem;
            color: var(--text-muted);
            line-height: 1.55;
            padding-left: 24px;
        }

        /* ==================== 底部CTA ==================== */
        .bottom-cta-section {
            padding: 28px 0 44px;
        }
        .bottom-cta {
            background: linear-gradient(155deg, #0c1a26 0%, #111f2e 35%, #0f1a28 70%, #131e30 100%);
            border-radius: var(--radius-xl);
            padding: 42px 26px;
            text-align: center;
            color: #fff;
            box-shadow: 0 0 50px rgba(6, 182, 212, 0.1), 0 0 30px rgba(139, 92, 246, 0.06);
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(6, 182, 212, 0.15);
        }
        .bottom-cta::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -25%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .bottom-cta::after {
            content: '';
            position: absolute;
            bottom: -50%;
            left: -20%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .bottom-cta h2 {
            font-size: clamp(1.5rem, 2.8vw, 2rem);
            font-weight: 720;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
            letter-spacing: -0.3px;
        }
        .bottom-cta p {
            font-size: 0.95rem;
            opacity: 0.85;
            max-width: 540px;
            margin: 0 auto 22px;
            position: relative;
            z-index: 1;
            color: #cbd5e1;
        }
        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--cyan-500), #22d3ee);
            color: #060b10;
            padding: 14px 34px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.02rem;
            text-decoration: none;
            transition: var(--ease-spring);
            position: relative;
            z-index: 1;
            box-shadow: 0 0 30px var(--cyan-glow);
            letter-spacing: 0.1px;
        }
        .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 48px rgba(6, 182, 212, 0.55);
            background: linear-gradient(135deg, #22d3ee, #67e8f9);
        }
        .bottom-cta .cta-sub-links {
            margin-top: 16px;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            position: relative;
            z-index: 1;
            font-size: 0.85rem;
        }
        .bottom-cta .cta-sub-links a {
            color: #94a3b8;
            text-decoration: none;
            font-weight: 500;
            transition: var(--ease-out);
        }
        .bottom-cta .cta-sub-links a:hover {
            color: var(--cyan-400);
            text-decoration: underline;
        }

        /* ==================== FOOTER ==================== */
        .footer {
            background: #060d14;
            color: #7d8f9f;
            padding: 40px 0 18px;
            border-top: 1px solid var(--border-subtle);
            border-top-left-radius: 24px;
            border-top-right-radius: 24px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 24px;
        }
        .footer-content h4 {
            color: #cbd5e1;
            margin-bottom: 8px;
            font-size: 0.95rem;
            font-weight: 620;
        }
        .footer-content p {
            font-size: 0.8rem;
            line-height: 1.55;
        }
        .footer-content a {
            color: #7d8f9f;
            text-decoration: none;
            transition: var(--ease-out);
        }
        .footer-content a:hover {
            color: var(--cyan-400);
            text-decoration: underline;
        }
        .footer-copyright {
            text-align: center;
            padding-top: 24px;
            font-size: 0.75rem;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            margin-top: 16px;
            opacity: 0.7;
            color: #5a6b7a;
        }
        .footer-copyright a {
            color: #7d8f9f;
            text-decoration: none;
        }
        .footer-copyright a:hover {
            color: var(--cyan-400);
        }

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 900px) {
            .hero {
                flex-direction: column;
                gap: 20px;
                padding: 28px 0 16px;
            }
            .hero-right {
                flex: unset;
                width: 100%;
            }
            .nav-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                gap: 2px;
                flex-wrap: wrap;
            }
            .nav-links a {
                font-size: 0.8rem;
                padding: 5px 9px;
            }
            .gateway-grid {
                grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            }
            .eco-grid {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            }
            .guide-grid {
                grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            }
            .upgrade-wrapper {
                grid-template-columns: 1fr;
            }
            .insight-card {
                padding: 22px 16px;
            }
        }
        @media (max-width: 480px) {
            .hero-left h1 {
                font-size: 1.6rem;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 8px;
            }
            .hero-buttons a,
            .hero-buttons button {
                text-align: center;
                justify-content: center;
            }
            .gateway-grid {
                grid-template-columns: 1fr;
            }
            .eco-grid {
                grid-template-columns: 1fr 1fr;
            }
            .guide-grid {
                grid-template-columns: 1fr 1fr;
            }
            .bottom-cta {
                padding: 28px 16px;
            }
            .faq-list {
                gap: 8px;
            }
        }