:root {
            --bg-deep: #060b16;
            --bg-primary: #0b1120;
            --bg-card: rgba(255, 255, 255, 0.035);
            --bg-card-hover: rgba(255, 255, 255, 0.06);
            --border-glass: rgba(255, 255, 255, 0.07);
            --border-active: rgba(245, 158, 11, 0.35);
            --text-primary: #f0f4ff;
            --text-secondary: rgba(240, 244, 255, 0.7);
            --text-muted: rgba(240, 244, 255, 0.4);
            --accent-cyan: #06b6d4;
            --accent-teal: #34d399;
            --accent-amber: #f59e0b;
            --accent-gold: #fbbf24;
            --accent-rose: #f43f5e;
            --accent-indigo: #8b5cf6;
            --gradient-main: linear-gradient(135deg, #06b6d4, #34d399);
            --gradient-lets: linear-gradient(135deg, #f59e0b, #fbbf24, #f59e0b);
            --gradient-warm: linear-gradient(135deg, #f59e0b, #f43f5e);
            --gradient-glow-lets: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(251, 191, 36, 0.1));
            --shadow-glow-lets: 0 0 80px rgba(245, 158, 11, 0.07), 0 0 160px rgba(251, 191, 36, 0.04);
            --shadow-glow-cyan: 0 0 80px rgba(6, 182, 212, 0.07), 0 0 160px rgba(52, 211, 153, 0.03);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, sans-serif;
            --radius-xl: 32px;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 90px;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        ::-webkit-scrollbar {
            width: 5px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-deep);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--accent-amber);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent-gold);
        }
        canvas#particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 0;
            pointer-events: none;
            opacity: 0.28;
        }
        .app {
            position: relative;
            z-index: 1;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* HEADER */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            padding: 12px 0;
            background: rgba(6, 11, 22, 0.55);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
        }
        header.scrolled {
            background: rgba(6, 11, 22, 0.94);
            box-shadow: 0 4px 50px rgba(0, 0, 0, 0.55);
            padding: 8px 0;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
            transition: opacity var(--transition-fast);
        }
        .logo:hover {
            opacity: 0.85;
        }
        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--gradient-lets);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 900;
            color: #1a1a1a;
            box-shadow: 0 0 36px rgba(245, 158, 11, 0.28);
            transition: transform var(--transition-smooth);
        }
        .logo:hover .logo-icon {
            transform: scale(1.06) rotate(-5deg);
        }
        .logo span {
            background: var(--gradient-lets);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 2px;
            flex-wrap: wrap;
        }
        nav a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 13.5px;
            font-weight: 500;
            padding: 7px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.08px;
            white-space: nowrap;
        }
        nav a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }
        nav a.active {
            color: #fff;
            background: rgba(245, 158, 11, 0.14);
            box-shadow: 0 0 22px rgba(245, 158, 11, 0.06);
            font-weight: 600;
        }
        nav a.active::after {
            content: '';
            position: absolute;
            bottom: 3px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            border-radius: 2px;
            background: var(--gradient-lets);
        }
        nav a.nav-letsvpn {
            color: var(--accent-gold);
            font-weight: 700;
            border: 1px solid rgba(245, 158, 11, 0.3);
            background: rgba(245, 158, 11, 0.08);
            letter-spacing: 0.3px;
            animation: nav-pulse 3s ease-in-out infinite;
        }
        @keyframes nav-pulse {
            0%,
            100% {
                box-shadow: 0 0 8px rgba(245, 158, 11, 0.08);
            }
            50% {
                box-shadow: 0 0 22px rgba(245, 158, 11, 0.18);
            }
        }
        nav a.nav-letsvpn:hover {
            background: rgba(245, 158, 11, 0.16);
            border-color: rgba(245, 158, 11, 0.5);
            color: #fde68a;
            box-shadow: 0 0 28px rgba(245, 158, 11, 0.16);
        }
        nav a.nav-letsvpn::before {
            content: '⚡';
            font-size: 11px;
            margin-right: 3px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .btn-header {
            padding: 7px 18px;
            border-radius: var(--radius-sm);
            background: var(--gradient-lets);
            color: #1a1a1a;
            font-size: 13px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 28px rgba(245, 158, 11, 0.18);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .btn-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 48px rgba(245, 158, 11, 0.32);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            z-index: 101;
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 920px) {
            .mobile-toggle {
                display: flex;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 6px;
                gap: 1px;
                order: 10;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 11px 16px;
                font-size: 14px;
                text-align: center;
                border-radius: var(--radius-xs);
            }
            nav a.active::after {
                display: none;
            }
            nav a.nav-letsvpn::before {
                content: '⚡ ';
            }
            .header-actions .btn-header {
                display: none;
            }
            .header-actions .btn-header.mobile-show {
                display: inline-flex;
                font-size: 12px;
                padding: 6px 14px;
            }
        }
        @media (min-width: 921px) {
            .header-actions .btn-header.mobile-show {
                display: none;
            }
        }

        /* HERO */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 130px 0 70px;
            position: relative;
            text-align: center;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -22%;
            left: -16%;
            width: 70%;
            height: 85%;
            background: radial-gradient(ellipse, rgba(245, 158, 11, 0.06), transparent 58%);
            pointer-events: none;
            animation: pulse-glow-lets 14s ease-in-out infinite alternate;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -22%;
            right: -16%;
            width: 60%;
            height: 70%;
            background: radial-gradient(ellipse, rgba(6, 182, 212, 0.04), transparent 55%);
            pointer-events: none;
            animation: pulse-glow-lets 12s ease-in-out infinite alternate-reverse;
        }
        @keyframes pulse-glow-lets {
            0% {
                opacity: 0.3;
                transform: scale(1);
            }
            100% {
                opacity: 0.85;
                transform: scale(1.1);
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 5px 18px 5px 11px;
            border-radius: 50px;
            background: rgba(245, 158, 11, 0.08);
            border: 1px solid rgba(245, 158, 11, 0.14);
            font-size: 12px;
            font-weight: 500;
            color: var(--accent-gold);
            backdrop-filter: blur(6px);
            transition: all var(--transition-smooth);
            margin-bottom: 18px;
            cursor: default;
        }
        .hero-badge:hover {
            border-color: rgba(245, 158, 11, 0.28);
            background: rgba(245, 158, 11, 0.12);
        }
        .hero-badge .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent-gold);
            animation: blink-dot-gold 2s ease-in-out infinite;
        }
        @keyframes blink-dot-gold {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.15;
                transform: scale(0.6);
            }
        }
        .hero h1 {
            font-size: clamp(46px, 7.5vw, 80px);
            font-weight: 800;
            line-height: 1.03;
            letter-spacing: -2.5px;
            margin-bottom: 10px;
        }
        .hero h1 .highlight-lets {
            background: var(--gradient-lets);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
        }
        .hero h1 .highlight-lets::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-lets);
            border-radius: 4px;
            opacity: 0.22;
            filter: blur(7px);
        }
        .hero .sub {
            font-size: clamp(16px, 1.3vw, 20px);
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 20px;
            line-height: 1.75;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 50px;
            flex-wrap: wrap;
            margin: 12px 0 24px;
        }
        .stat-item {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .stat-item .number {
            font-size: clamp(34px, 3.8vw, 52px);
            font-weight: 800;
            background: var(--gradient-lets);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            letter-spacing: -1.5px;
        }
        .stat-item .label {
            font-size: 12.5px;
            color: var(--text-muted);
            font-weight: 500;
            margin-top: 5px;
            letter-spacing: 0.3px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            margin-top: 2px;
        }
        .btn-primary-lets {
            padding: 15px 44px;
            border-radius: var(--radius-md);
            background: var(--gradient-lets);
            color: #1a1a1a;
            font-size: 15px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 55px rgba(245, 158, 11, 0.22);
            position: relative;
            overflow: hidden;
        }
        .btn-primary-lets::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), transparent 50%);
            pointer-events: none;
        }
        .btn-primary-lets:hover {
            transform: translateY(-3px) scale(1.03);
            box-shadow: 0 0 80px rgba(245, 158, 11, 0.38);
        }
        .btn-secondary {
            padding: 15px 42px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.03);
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid var(--border-glass);
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition-smooth);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.14);
            transform: translateY(-3px);
            box-shadow: 0 8px 44px rgba(0, 0, 0, 0.35);
        }
        .hero-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            margin-top: 55px;
            max-width: 960px;
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 820px) {
            .hero-cards {
                grid-template-columns: 1fr;
                max-width: 400px;
                gap: 16px;
            }
            .hero-stats {
                gap: 30px;
            }
        }
        .hero-card {
            padding: 26px 22px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(6px);
            transition: all var(--transition-smooth);
            text-align: left;
            cursor: default;
        }
        .hero-card:hover {
            transform: translateY(-5px);
            border-color: rgba(245, 158, 11, 0.18);
            box-shadow: var(--shadow-glow-lets);
            background: var(--bg-card-hover);
        }
        .hero-card .icon {
            font-size: 30px;
            margin-bottom: 10px;
            display: block;
        }
        .hero-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 5px;
            letter-spacing: -0.2px;
        }
        .hero-card p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* SECTION COMMONS */
        .section-label {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2.8px;
            color: var(--accent-gold);
            background: rgba(245, 158, 11, 0.06);
            padding: 4px 16px;
            border-radius: 50px;
            border: 1px solid rgba(245, 158, 11, 0.06);
            margin-bottom: 12px;
        }
        .section-label-cyan {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2.8px;
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.05);
            padding: 4px 16px;
            border-radius: 50px;
            border: 1px solid rgba(6, 182, 212, 0.05);
            margin-bottom: 12px;
        }
        .section-heading {
            font-size: clamp(26px, 3.2vw, 42px);
            font-weight: 700;
            letter-spacing: -0.6px;
            line-height: 1.12;
            margin-bottom: 8px;
            text-align: center;
        }
        .section-heading .highlight-lets {
            background: var(--gradient-lets);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-heading .highlight-cyan {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-subtitle {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 520px;
            text-align: center;
            margin: 0 auto 40px;
            line-height: 1.7;
        }

        /* 全球节点网络 */
        .network-section {
            padding: 70px 0 90px;
            position: relative;
        }
        .network-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 55%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.16), transparent);
        }
        .node-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            margin-bottom: 36px;
        }
        @media (max-width: 1024px) {
            .node-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .node-grid {
                grid-template-columns: 1fr;
                max-width: 360px;
                margin-left: auto;
                margin-right: auto;
            }
        }
        .node-card {
            padding: 22px 18px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
            text-align: center;
            cursor: default;
            position: relative;
            overflow: hidden;
        }
        .node-card::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -30%;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.05), transparent 70%);
            pointer-events: none;
            transition: all var(--transition-smooth);
        }
        .node-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-glow-lets);
            background: var(--bg-card-hover);
        }
        .node-card:hover::after {
            top: -15%;
            right: -15%;
            width: 140px;
            height: 140px;
        }
        .node-card .node-region {
            font-size: 28px;
            margin-bottom: 6px;
            display: block;
        }
        .node-card h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .node-card .node-count {
            font-size: 12px;
            color: var(--accent-gold);
            font-weight: 500;
        }
        .node-card .node-cities {
            font-size: 11.5px;
            color: var(--text-muted);
            margin-top: 4px;
            line-height: 1.5;
        }
        .node-status-bar {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 28px;
            flex-wrap: wrap;
            padding: 20px 28px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            max-width: 700px;
            margin: 0 auto;
        }
        .node-status-bar .status-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--accent-gold);
            animation: blink-dot-gold 2.2s ease-in-out infinite;
        }
        .node-status-bar span {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .node-status-bar strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* 速度优势版块 */
        .speed-section {
            padding: 50px 0 80px;
            position: relative;
        }
        .speed-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            align-items: center;
            max-width: 960px;
            margin: 0 auto;
        }
        @media (max-width: 820px) {
            .speed-showcase {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .speed-visual {
            border-radius: var(--radius-xl);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            padding: 28px 22px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .speed-bar-group {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }
        .speed-bar-label {
            display: flex;
            justify-content: space-between;
            font-size: 12.5px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .speed-bar-track {
            height: 8px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
            overflow: hidden;
        }
        .speed-bar-fill {
            height: 100%;
            border-radius: 10px;
            transition: width 1.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .speed-bar-fill.gold {
            background: var(--gradient-lets);
        }
        .speed-bar-fill.teal {
            background: linear-gradient(90deg, #34d399, #06b6d4);
        }
        .speed-bar-fill.indigo {
            background: linear-gradient(90deg, #8b5cf6, #6366f1);
        }
        .speed-text h3 {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -0.4px;
            margin-bottom: 8px;
        }
        .speed-text h3 .highlight-lets {
            background: var(--gradient-lets);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .speed-text p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .speed-text .speed-metric {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .speed-text .speed-metric span {
            font-size: 12.5px;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.02);
            padding: 6px 14px;
            border-radius: 50px;
            border: 1px solid var(--border-glass);
        }

        /* 安全防护层级 */
        .security-section {
            padding: 50px 0 80px;
            position: relative;
        }
        .security-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            max-width: 960px;
            margin: 0 auto;
        }
        @media (max-width: 820px) {
            .security-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
                gap: 16px;
            }
        }
        .security-card {
            padding: 24px 20px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
            text-align: center;
            cursor: default;
            position: relative;
        }
        .security-card:hover {
            transform: translateY(-5px);
            border-color: rgba(245, 158, 11, 0.16);
            box-shadow: var(--shadow-glow-lets);
            background: var(--bg-card-hover);
        }
        .security-card .sec-icon {
            font-size: 38px;
            margin-bottom: 10px;
            display: block;
        }
        .security-card h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .security-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .security-card .sec-level {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 10px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-top: 8px;
            background: rgba(245, 158, 11, 0.08);
            color: var(--accent-gold);
            border: 1px solid rgba(245, 158, 11, 0.12);
        }

        /* 多场景应用 */
        .scenarios-section {
            padding: 40px 0 80px;
            position: relative;
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            max-width: 1000px;
            margin: 0 auto;
        }
        @media (max-width: 900px) {
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 500px) {
            .scenario-grid {
                grid-template-columns: 1fr;
                max-width: 340px;
                gap: 12px;
            }
        }
        .scenario-card {
            padding: 22px 16px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
            text-align: center;
            cursor: default;
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            border-color: rgba(245, 158, 11, 0.12);
            box-shadow: var(--shadow-glow-lets);
            background: var(--bg-card-hover);
        }
        .scenario-card .sc-icon {
            font-size: 34px;
            margin-bottom: 8px;
            display: block;
        }
        .scenario-card h4 {
            font-size: 14.5px;
            font-weight: 600;
            margin-bottom: 3px;
        }
        .scenario-card p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 套餐价格 */
        .pricing-section {
            padding: 50px 0 90px;
            position: relative;
        }
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            max-width: 1000px;
            margin: 0 auto;
        }
        @media (max-width: 860px) {
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                gap: 18px;
            }
        }
        .pricing-card {
            padding: 30px 24px;
            border-radius: var(--radius-xl);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
            text-align: center;
            position: relative;
            display: flex;
            flex-direction: column;
            cursor: default;
        }
        .pricing-card:hover {
            transform: translateY(-5px);
            border-color: rgba(245, 158, 11, 0.18);
            box-shadow: var(--shadow-glow-lets);
            background: var(--bg-card-hover);
        }
        .pricing-card.featured {
            border-color: rgba(245, 158, 11, 0.32);
            background: rgba(245, 158, 11, 0.04);
            box-shadow: 0 0 60px rgba(245, 158, 11, 0.07);
            transform: scale(1.03);
        }
        .pricing-card.featured:hover {
            transform: scale(1.03) translateY(-5px);
            border-color: rgba(245, 158, 11, 0.45);
        }
        @media (max-width: 860px) {
            .pricing-card.featured {
                transform: scale(1);
            }
            .pricing-card.featured:hover {
                transform: translateY(-5px);
            }
        }
        .pricing-badge {
            position: absolute;
            top: -13px;
            left: 50%;
            transform: translateX(-50%);
            padding: 5px 18px;
            border-radius: 50px;
            background: var(--gradient-lets);
            color: #1a1a1a;
            font-size: 11px;
            font-weight: 700;
            letter-spacing: 0.8px;
            box-shadow: 0 0 30px rgba(245, 158, 11, 0.28);
            white-space: nowrap;
        }
        .pricing-card .plan-icon {
            font-size: 36px;
            margin-bottom: 10px;
        }
        .pricing-card h4 {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.2px;
            margin-bottom: 4px;
        }
        .pricing-card .plan-desc {
            font-size: 12.5px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }
        .pricing-card .plan-price {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -1.5px;
            background: var(--gradient-lets);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 4px;
        }
        .pricing-card .plan-period {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }
        .pricing-card .plan-features {
            list-style: none;
            text-align: left;
            margin-bottom: 18px;
            flex-grow: 1;
        }
        .pricing-card .plan-features li {
            padding: 5px 0;
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .pricing-card .plan-features li::before {
            content: '✓';
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 13px;
            flex-shrink: 0;
        }
        .pricing-card .btn-plan {
            display: block;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            background: var(--gradient-lets);
            color: #1a1a1a;
            font-size: 14px;
            font-weight: 700;
            text-decoration: none;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 30px rgba(245, 158, 11, 0.12);
            border: none;
            cursor: pointer;
            text-align: center;
        }
        .pricing-card .btn-plan:hover {
            box-shadow: 0 0 50px rgba(245, 158, 11, 0.28);
            transform: translateY(-2px);
        }

        /* CTA */
        .cta-strip {
            padding: 30px 0 50px;
        }
        .cta-strip-inner {
            padding: 28px 32px;
            border-radius: var(--radius-xl);
            background: linear-gradient(135deg, rgba(245, 158, 11, 0.07), rgba(6, 182, 212, 0.04));
            border: 1px solid rgba(245, 158, 11, 0.1);
            text-align: center;
            transition: all var(--transition-smooth);
        }
        .cta-strip-inner:hover {
            border-color: rgba(245, 158, 11, 0.2);
            box-shadow: var(--shadow-glow-lets);
        }
        .cta-strip-inner h3 {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 6px;
        }
        .cta-strip-inner h3 .highlight-lets {
            background: var(--gradient-lets);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-strip-inner p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }

        /* 信任认证 */
        .trust {
            padding: 30px 0 60px;
        }
        .trust-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            padding: 26px 34px;
            border-radius: var(--radius-xl);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
        }
        .trust-wrap:hover {
            border-color: rgba(245, 158, 11, 0.08);
            box-shadow: var(--shadow-glow-lets);
        }
        .trust-left {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .trust-left .badge-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--gradient-lets);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            font-weight: 700;
            color: #1a1a1a;
            flex-shrink: 0;
            box-shadow: 0 0 36px rgba(245, 158, 11, 0.16);
        }
        .trust-left .text h4 {
            font-size: 16px;
            font-weight: 600;
            letter-spacing: -0.1px;
        }
        .trust-left .text p {
            font-size: 12.5px;
            color: var(--text-secondary);
        }
        .trust-right {
            display: flex;
            gap: 9px;
            flex-wrap: wrap;
        }
        .trust-right .tag {
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 11.5px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.025);
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }
        .trust-right .tag.verified {
            background: rgba(245, 158, 11, 0.05);
            border-color: rgba(245, 158, 11, 0.08);
            color: var(--accent-gold);
        }
        .trust-right .tag:hover {
            border-color: rgba(255, 255, 255, 0.12);
            color: var(--text-primary);
        }
        @media (max-width: 640px) {
            .trust-wrap {
                padding: 20px 16px;
                flex-direction: column;
                align-items: flex-start;
            }
            .trust-right {
                width: 100%;
            }
        }

        /* 下载引导 */
        .download-section {
            padding: 30px 0 70px;
        }
        .download-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 22px;
            max-width: 800px;
            margin: 0 auto;
        }
        @media (max-width: 600px) {
            .download-grid {
                grid-template-columns: 1fr;
                max-width: 380px;
            }
        }
        .download-card {
            padding: 26px 22px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(6px);
            transition: all var(--transition-smooth);
            text-decoration: none;
            color: inherit;
            display: flex;
            align-items: center;
            gap: 16px;
            position: relative;
            overflow: hidden;
        }
        .download-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--gradient-glow-lets);
            opacity: 0;
            transition: opacity 0.5s ease;
            border-radius: var(--radius-lg);
        }
        .download-card:hover {
            transform: translateY(-4px);
            border-color: rgba(245, 158, 11, 0.12);
            box-shadow: var(--shadow-glow-lets);
        }
        .download-card:hover::before {
            opacity: 1;
        }
        .download-card .dl-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(245, 158, 11, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            border: 1px solid rgba(245, 158, 11, 0.04);
        }
        .download-card .dl-info {
            position: relative;
            z-index: 1;
        }
        .download-card .dl-info h4 {
            font-size: 16px;
            font-weight: 600;
        }
        .download-card .dl-info p {
            font-size: 12.5px;
            color: var(--text-secondary);
        }
        .download-card .dl-arrow {
            margin-left: auto;
            font-size: 17px;
            color: var(--text-muted);
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 1;
        }
        .download-card:hover .dl-arrow {
            transform: translateX(5px);
            color: var(--accent-gold);
        }

        /* FOOTER */
        footer {
            padding: 32px 0 24px;
            border-top: 1px solid var(--border-glass);
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-inner .copy {
            font-size: 12.5px;
            color: var(--text-muted);
        }
        .footer-inner .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-inner .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 12.5px;
            transition: color var(--transition-fast);
        }
        .footer-inner .footer-links a:hover {
            color: var(--accent-gold);
        }
        @media (max-width: 600px) {
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-inner .footer-links {
                justify-content: center;
            }
        }

        .scroll-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            font-size: 17px;
            cursor: pointer;
            backdrop-filter: blur(10px);
            transition: all var(--transition-smooth);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .scroll-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .scroll-top:hover {
            background: rgba(245, 158, 11, 0.08);
            border-color: rgba(245, 158, 11, 0.16);
            color: var(--accent-gold);
            transform: translateY(-5px);
            box-shadow: 0 0 28px rgba(245, 158, 11, 0.06);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .section-desc-center {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 480px;
            line-height: 1.7;
            text-align: center;
            margin: 0 auto 32px;
        }