/* roulang page: index */
:root {
            --bg-deep: #0B0B1F;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.07);
            --neon-cyan: #00F0FF;
            --neon-cyan-glow: rgba(0, 240, 255, 0.45);
            --neon-cyan-soft: rgba(0, 240, 255, 0.18);
            --purple-start: #7D00FF;
            --purple-end: #D400FF;
            --purple-glow: rgba(180, 0, 255, 0.5);
            --data-orange: #FF5F1F;
            --data-orange-glow: rgba(255, 95, 31, 0.5);
            --text-primary: #F4F4F6;
            --text-secondary: #B0B3C1;
            --text-weak: #6B6F82;
            --border-neon: rgba(0, 240, 255, 0.3);
            --border-neon-hover: rgba(0, 240, 255, 0.7);
            --border-card: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-neon: 0 0 24px rgba(0, 240, 255, 0.3), 0 0 60px rgba(0, 240, 255, 0.1);
            --shadow-neon-strong: 0 0 32px rgba(0, 240, 255, 0.5), 0 0 80px rgba(0, 240, 255, 0.2);
            --shadow-purple: 0 0 28px rgba(180, 0, 255, 0.35);
            --shadow-orange: 0 0 22px rgba(255, 95, 31, 0.4);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 100px;
            --spacing-3xl: 120px;
            --container-max: 1280px;
            --nav-height: 68px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
            --font-h1: 48px;
            --font-h2: 36px;
            --font-h3: 24px;
            --font-body: 16px;
            --font-small: 13px;
            --font-weight-h1: 800;
            --font-weight-h2: 700;
            --font-weight-h3: 600;
            --line-height-body: 1.7;
            --line-height-heading: 1.25;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Segoe UI', Roboto, sans-serif;
            font-size: var(--font-body);
            line-height: var(--line-height-body);
            color: var(--text-primary);
            background: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 30% 15%, rgba(125, 0, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 25%, rgba(0, 240, 255, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 60%, rgba(212, 0, 255, 0.05) 0%, transparent 50%);
            background-attachment: fixed;
            overflow-x: hidden;
            min-height: 100vh;
            position: relative;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            opacity: 0.03;
            background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5 L55 30 L30 55 L5 30 Z' fill='none' stroke='%2300F0FF' stroke-width='0.5'/%3E%3Ccircle cx='30' cy='30' r='2' fill='%2300F0FF'/%3E%3C/svg%3E");
            background-size: 60px 60px;
        }

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

        a {
            color: var(--neon-cyan);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: #5cf7ff;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        }
        a:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }
        button:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: var(--radius-md);
        }

        input,
        textarea {
            font-family: inherit;
            font-size: var(--font-body);
            transition: var(--transition-base);
        }
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            position: relative;
            z-index: 1;
        }

        /* ========== NAVIGATION ========== */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 11, 31, 0.78);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition-base);
        }
        .nav.scrolled {
            background: rgba(11, 11, 31, 0.92);
            border-bottom-color: rgba(0, 240, 255, 0.15);
            box-shadow: 0 4px 32px rgba(0, 0, 0, 0.5);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            text-decoration: none;
            z-index: 1001;
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--neon-cyan);
            text-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
        }
        .nav-logo-icon {
            width: 38px;
            height: 38px;
            position: relative;
            flex-shrink: 0;
        }
        .nav-logo-icon .crosshair {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 26px;
            height: 26px;
            border: 2.5px solid var(--neon-cyan);
            border-radius: 50%;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }
        .nav-logo-icon .crosshair::before,
        .nav-logo-icon .crosshair::after {
            content: '';
            position: absolute;
            background: var(--neon-cyan);
        }
        .nav-logo-icon .crosshair::before {
            top: 50%;
            left: -6px;
            width: 38px;
            height: 2px;
            transform: translateY(-50%);
        }
        .nav-logo-icon .crosshair::after {
            left: 50%;
            top: -6px;
            width: 2px;
            height: 38px;
            transform: translateX(-50%);
        }
        .nav-logo-icon .bolt {
            position: absolute;
            top: 2px;
            right: -2px;
            width: 14px;
            height: 20px;
            background: var(--data-orange);
            clip-path: polygon(50% 0%, 0% 55%, 35% 55%, 15% 100%, 100% 40%, 60% 40%, 85% 0%);
            box-shadow: 0 0 8px rgba(255, 95, 31, 0.6);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
            list-style: none;
        }
        .nav-links a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            padding: 6px 2px;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--neon-cyan);
            border-radius: 2px;
            transition: width var(--transition-base);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: #fff;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-cta-btn {
            background: var(--neon-cyan);
            color: #0B0B1F;
            font-weight: 700;
            padding: 10px 20px;
            border-radius: var(--radius-md);
            font-size: 14px;
            letter-spacing: 0.3px;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            background: #3df7ff;
            box-shadow: var(--shadow-neon-strong);
            transform: translateY(-1px);
        }
        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 8px;
            min-width: 44px;
            min-height: 44px;
            align-items: center;
            justify-content: center;
            background: none;
            border: none;
        }
        .nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }
        .nav-hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            padding-top: var(--nav-height);
            background: linear-gradient(160deg, rgba(11, 11, 31, 0.92) 0%, rgba(20, 10, 40, 0.88) 40%, rgba(10, 14, 39, 0.9) 100%);
        }
        .hero-bg-img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
            opacity: 0.35;
            filter: saturate(0.6) brightness(0.55);
        }
        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
            background:
                radial-gradient(ellipse at 25% 30%, rgba(125, 0, 255, 0.2) 0%, transparent 55%),
                radial-gradient(ellipse at 70% 55%, rgba(0, 240, 255, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 40% 80%, rgba(212, 0, 255, 0.12) 0%, transparent 45%);
        }
        .hero-particle-canvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 2;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: var(--spacing-2xl) var(--spacing-md);
        }
        .hero-text {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-neon);
            border-radius: 50px;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 600;
            color: var(--neon-cyan);
            width: fit-content;
            letter-spacing: 0.5px;
        }
        .hero-badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--neon-cyan);
            animation: pulse-dot 2s ease-in-out infinite;
            box-shadow: 0 0 8px var(--neon-cyan-glow);
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 8px var(--neon-cyan-glow);
            }
            50% {
                box-shadow: 0 0 20px var(--neon-cyan-glow), 0 0 36px rgba(0, 240, 255, 0.35);
            }
        }
        .hero-title {
            font-size: var(--font-h1);
            font-weight: var(--font-weight-h1);
            line-height: var(--line-height-heading);
            color: #fff;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--neon-cyan) 0%, #5cf7ff 60%, var(--purple-end) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(0 0 18px rgba(0, 240, 255, 0.5));
        }
        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 520px;
        }
        .hero-buttons {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            margin-top: var(--spacing-xs);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.3px;
            transition: var(--transition-base);
            min-height: 48px;
            min-width: 44px;
            cursor: pointer;
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--neon-cyan);
            color: #0B0B1F;
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.35);
        }
        .btn-primary:hover {
            background: #3df7ff;
            box-shadow: var(--shadow-neon-strong);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--neon-cyan);
            border: 2px solid var(--border-neon);
        }
        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--border-neon-hover);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
            transform: translateY(-2px);
        }
        .btn-disabled {
            background: #3a3a4a;
            color: #777;
            cursor: not-allowed;
            pointer-events: none;
            border: none;
            box-shadow: none;
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero-dashboard {
            width: 100%;
            max-width: 540px;
            aspect-ratio: 4/3;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-xl);
            overflow: hidden;
            position: relative;
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.12), 0 20px 60px rgba(0, 0, 0, 0.5);
        }
        .hero-dashboard img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.85;
        }
        .hero-dashboard-glow {
            position: absolute;
            top: -20%;
            right: -15%;
            width: 60%;
            height: 60%;
            background: radial-gradient(ellipse, rgba(0, 240, 255, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-scroll-indicator {
            position: absolute;
            bottom: 28px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 4;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            color: var(--text-weak);
            font-size: 12px;
            letter-spacing: 0.5px;
            animation: float-updown 2.2s ease-in-out infinite;
        }
        .hero-scroll-indicator .arrow {
            width: 28px;
            height: 28px;
            border-right: 2px solid var(--neon-cyan);
            border-bottom: 2px solid var(--neon-cyan);
            transform: rotate(45deg);
            opacity: 0.7;
        }
        @keyframes float-updown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(-10px);
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: var(--spacing-3xl) 0;
            position: relative;
            z-index: 1;
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--neon-cyan);
            margin-bottom: var(--spacing-sm);
        }
        .section-title {
            font-size: var(--font-h2);
            font-weight: var(--font-weight-h2);
            color: #fff;
            letter-spacing: -0.3px;
            line-height: var(--line-height-heading);
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            margin-top: var(--spacing-xs);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== FEATURES - 非对称布局 ========== */
        .features-grid {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xl);
        }
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        .feature-row.reverse {
            direction: rtl;
        }
        .feature-row.reverse>* {
            direction: ltr;
        }
        .feature-row.wide-narrow {
            grid-template-columns: 1.3fr 0.7fr;
        }
        .feature-row.narrow-wide {
            grid-template-columns: 0.7fr 1.3fr;
        }
        .feature-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-card);
            aspect-ratio: 16/10;
            background: rgba(255, 255, 255, 0.02);
        }
        .feature-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.8;
            transition: var(--transition-slow);
        }
        .feature-image-wrap:hover img {
            opacity: 1;
            transform: scale(1.03);
        }
        .feature-image-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            opacity: 0;
            transition: var(--transition-base);
            pointer-events: none;
        }
        .feature-image-wrap:hover::after {
            opacity: 1;
            box-shadow: inset 0 0 30px rgba(0, 240, 255, 0.08);
        }
        .feature-text {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .feature-text .feature-icon-bar {
            width: 40px;
            height: 3px;
            background: var(--neon-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }
        .feature-text h3 {
            font-size: var(--font-h3);
            font-weight: var(--font-weight-h3);
            color: #fff;
            letter-spacing: -0.2px;
        }
        .feature-text p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .feature-stat-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 95, 31, 0.12);
            color: var(--data-orange);
            font-weight: 700;
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 50px;
            width: fit-content;
            border: 1px solid rgba(255, 95, 31, 0.3);
        }
        .feature-full-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            position: relative;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .feature-full-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            transform: translateY(-4px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.1);
        }
        .feature-full-card .bg-accent {
            position: absolute;
            top: -30%;
            right: -15%;
            width: 50%;
            height: 160%;
            background: radial-gradient(ellipse, rgba(212, 0, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        /* ========== SCENARIOS - Timeline ========== */
        .scenarios-timeline {
            position: relative;
            padding-left: 0;
            max-width: 900px;
            margin: 0 auto;
        }
        .scenarios-timeline::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--neon-cyan), var(--purple-end), transparent);
            opacity: 0.5;
        }
        .scenario-item {
            display: flex;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-xl);
            position: relative;
        }
        .scenario-dot {
            flex-shrink: 0;
            width: 58px;
            height: 58px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.08);
            border: 2px solid var(--border-neon);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 2;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.2);
            transition: var(--transition-base);
        }
        .scenario-item:hover .scenario-dot {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.45);
            border-color: var(--border-neon-hover);
            background: rgba(0, 240, 255, 0.15);
        }
        .scenario-dot i {
            color: var(--neon-cyan);
            font-size: 20px;
        }
        .scenario-card {
            flex: 1;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            transition: var(--transition-base);
            display: flex;
            gap: var(--spacing-md);
            align-items: flex-start;
        }
        .scenario-card:hover {
            border-color: var(--border-neon);
            background: var(--bg-card-hover);
            transform: translateX(6px);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.08);
        }
        .scenario-card-img {
            width: 100px;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            border: 1px solid var(--border-card);
        }
        .scenario-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scenario-card-text h4 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .scenario-card-text p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
        }

        /* ========== CASES ========== */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            position: relative;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .case-card:hover {
            border-color: var(--border-neon);
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
        }
        .case-quote-icon {
            font-size: 48px;
            color: var(--neon-cyan);
            opacity: 0.35;
            line-height: 1;
            font-family: Georgia, 'Times New Roman', serif;
        }
        .case-quote {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-style: italic;
        }
        .case-stats {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .case-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .case-stat-value {
            font-size: 28px;
            font-weight: 800;
            color: var(--data-orange);
            letter-spacing: -1px;
            font-family: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        .case-stat-label {
            font-size: 12px;
            color: var(--text-weak);
            letter-spacing: 0.3px;
        }
        .case-user {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: auto;
            padding-top: var(--spacing-sm);
            border-top: 1px solid var(--border-card);
        }
        .case-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            flex-shrink: 0;
        }
        .case-user-info {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .case-user-info strong {
            color: #fff;
            display: block;
        }

        /* ========== PRICING ========== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
            align-items: stretch;
        }
        .pricing-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            transition: var(--transition-base);
            position: relative;
        }
        .pricing-card:hover {
            border-color: var(--border-neon);
            transform: translateY(-6px);
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.45);
        }
        .pricing-card.featured {
            border-color: var(--border-neon-hover);
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.15);
            background: rgba(0, 240, 255, 0.03);
            transform: translateY(-8px);
        }
        .pricing-card.featured:hover {
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.25);
            transform: translateY(-10px);
        }
        .pricing-badge {
            position: absolute;
            top: -14px;
            right: 24px;
            background: var(--data-orange);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 50px;
            letter-spacing: 0.5px;
            box-shadow: var(--shadow-orange);
        }
        .pricing-name {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }
        .pricing-price {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1.5px;
            font-family: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        .pricing-price .currency {
            font-size: 20px;
            vertical-align: super;
            margin-right: 2px;
        }
        .pricing-price .period {
            font-size: 14px;
            color: var(--text-weak);
            font-weight: 400;
            letter-spacing: 0;
        }
        .pricing-features {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .pricing-features li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .pricing-features li i {
            color: var(--neon-cyan);
            font-size: 12px;
        }
        .pricing-card .btn {
            width: 100%;
            margin-top: auto;
        }
        .pricing-consult-form {
            margin-top: var(--spacing-xl);
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            display: grid;
            grid-template-columns: 1fr 1fr 1fr auto;
            gap: var(--spacing-sm);
            align-items: end;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            color: #fff;
            font-size: 14px;
            transition: var(--transition-base);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--neon-cyan);
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.2);
            outline: none;
            background: rgba(255, 255, 255, 0.06);
        }
        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-weak);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--border-neon);
        }
        .faq-item.open {
            border-color: var(--border-neon-hover);
            background: rgba(0, 240, 255, 0.03);
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            background: none;
            border: none;
            text-align: left;
            min-height: 52px;
            transition: var(--transition-base);
        }
        .faq-question:hover {
            color: var(--neon-cyan);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--neon-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--neon-cyan);
            transition: var(--transition-base);
            font-weight: 700;
            line-height: 1;
        }
        .faq-item.open .faq-icon {
            background: var(--neon-cyan);
            color: #0B0B1F;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }
        .faq-answer p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: #070718;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: var(--spacing-xl);
        }
        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
        }
        .footer-logo .nav-logo-icon {
            width: 38px;
            height: 38px;
        }
        .footer-desc {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-social {
            display: flex;
            gap: var(--spacing-sm);
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--border-card);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: var(--transition-base);
            font-size: 16px;
        }
        .footer-social a:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.25);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            color: var(--text-weak);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .footer-col ul a:hover {
            color: var(--neon-cyan);
        }
        .footer-bottom {
            margin-top: var(--spacing-xl);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            color: var(--text-weak);
            font-size: 13px;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --font-h1: 38px;
                --font-h2: 28px;
                --font-h3: 21px;
                --spacing-3xl: 80px;
                --spacing-2xl: 60px;
            }
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
                gap: var(--spacing-lg);
            }
            .hero-text {
                align-items: center;
            }
            .hero-subtitle {
                max-width: 100%;
            }
            .hero-dashboard {
                max-width: 400px;
            }
            .hero-badge {
                margin: 0 auto;
            }
            .feature-row,
            .feature-row.wide-narrow,
            .feature-row.narrow-wide {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .feature-row.reverse {
                direction: ltr;
            }
            .feature-full-card {
                grid-template-columns: 1fr;
            }
            .cases-grid {
                grid-template-columns: 1fr 1fr;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }
            .pricing-consult-form {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .scenario-card {
                flex-direction: column;
            }
            .scenario-card-img {
                width: 100%;
                height: 120px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --font-h1: 30px;
                --font-h2: 24px;
                --font-h3: 19px;
                --font-body: 15px;
                --spacing-3xl: 60px;
                --spacing-2xl: 40px;
                --spacing-xl: 32px;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 260px;
                height: 100vh;
                background: rgba(11, 11, 31, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 100px var(--spacing-lg) var(--spacing-lg);
                gap: var(--spacing-md);
                transition: right var(--transition-base);
                border-left: 1px solid rgba(255, 255, 255, 0.06);
                z-index: 1000;
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                font-size: 17px;
                padding: 8px 0;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-cta-btn {
                display: none;
            }
            .nav-links .nav-cta-btn-mobile {
                display: inline-flex;
                margin-top: var(--spacing-sm);
            }
            .hero {
                min-height: auto;
                padding: calc(var(--nav-height) + 40px) 0 var(--spacing-2xl);
            }
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
                padding: var(--spacing-lg) var(--spacing-md);
            }
            .hero-text {
                align-items: center;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-dashboard {
                max-width: 320px;
            }
            .hero-scroll-indicator {
                display: none;
            }
            .feature-image-wrap {
                aspect-ratio: 16/9;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .pricing-consult-form {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .scenarios-timeline::before {
                left: 20px;
            }
            .scenario-dot {
                width: 40px;
                height: 40px;
            }
            .scenario-dot i {
                font-size: 16px;
            }
            .scenario-item {
                gap: var(--spacing-sm);
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
                min-height: 44px;
            }
            .section-title {
                font-size: 22px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --font-h1: 26px;
                --font-h2: 21px;
                --font-h3: 17px;
                --spacing-3xl: 48px;
                --spacing-2xl: 32px;
                --spacing-xl: 24px;
                --spacing-lg: 20px;
            }
            .hero-title {
                letter-spacing: 0;
            }
            .hero-dashboard {
                max-width: 260px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            .pricing-card {
                padding: var(--spacing-lg);
            }
            .case-card {
                padding: var(--spacing-lg);
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .container {
                padding: 0 var(--spacing-sm);
            }
        }

        /* Menu overlay for mobile */
        .nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.55);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-base);
        }
        .nav-overlay.visible {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== ANIMATIONS ========== */
        @keyframes glow-pulse {
            0%,
            100% {
                box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
            }
            50% {
                box-shadow: 0 0 34px rgba(0, 240, 255, 0.55), 0 0 60px rgba(0, 240, 255, 0.2);
            }
        }
        .glow-pulse {
            animation: glow-pulse 3s ease-in-out infinite;
        }