/* roulang page: index */
:root {
            --bg-deep: #0A0E1A;
            --bg-surface: #0B1120;
            --bg-card: rgba(255, 255, 255, 0.03);
            --text-primary: #FFFFFF;
            --text-secondary: rgba(255, 255, 255, 0.8);
            --text-muted: rgba(255, 255, 255, 0.55);
            --accent-green: #00E5A0;
            --accent-green-glow: rgba(0, 229, 160, 0.5);
            --accent-orange: #FF6B3D;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-medium: rgba(255, 255, 255, 0.14);
            --border-focus: rgba(0, 229, 160, 0.55);
            --radius-sm: 10px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.55);
            --shadow-glow: 0 0 18px rgba(0, 229, 160, 0.5);
            --shadow-glow-strong: 0 0 32px rgba(0, 229, 160, 0.7);
            --spacing-section: 100px;
            --spacing-card-pad: 32px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
            --nav-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            background-color: var(--bg-deep);
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
            background-size: 56px 56px;
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        input:focus-visible,
        textarea:focus-visible,
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 14, 26, 0.72);
            backdrop-filter: blur(18px) saturate(160%);
            -webkit-backdrop-filter: blur(18px) saturate(160%);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(10, 14, 26, 0.9);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, #00E5A0 0%, #0098c7 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #0A0E1A;
            font-weight: 900;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 229, 160, 0.35);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }

        .nav-menu li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-menu li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2.5px;
            background: var(--accent-green);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-green-glow);
            transition: transform var(--transition-smooth);
            transform-origin: center;
        }

        .nav-menu li a:hover,
        .nav-menu li a:active {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-menu li a:hover::after,
        .nav-menu li a.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            background: transparent;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 2px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(8.5px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-8.5px) rotate(-45deg);
        }

        /* ========== MOBILE NAV OVERLAY ========== */
        .mobile-nav-overlay {
            position: fixed;
            inset: 0;
            z-index: 999;
            background: rgba(10, 14, 26, 0.94);
            backdrop-filter: blur(28px) saturate(180%);
            -webkit-backdrop-filter: blur(28px) saturate(180%);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 12px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

        .mobile-nav-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-nav-overlay a {
            font-size: 1.25rem;
            font-weight: 600;
            color: #fff;
            padding: 14px 28px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.04);
            width: 240px;
            text-align: center;
            transition: all var(--transition-fast);
        }

        .mobile-nav-overlay a:hover {
            background: rgba(0, 229, 160, 0.12);
            color: var(--accent-green);
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.2);
        }

        /* ========== HERO ========== */
        .hero-section {
            padding-top: calc(var(--nav-height) + 48px);
            padding-bottom: 80px;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 55% 45%;
            gap: 40px;
            align-items: center;
        }

        .hero-left {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 229, 160, 0.08);
            border: 1px solid rgba(0, 229, 160, 0.22);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 0.85rem;
            color: var(--accent-green);
            font-weight: 500;
            width: fit-content;
            letter-spacing: 0.3px;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-green);
            box-shadow: 0 0 8px var(--accent-green-glow);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 8px var(--accent-green-glow);
            }
            50% {
                box-shadow: 0 0 20px rgba(0, 229, 160, 0.9);
            }
        }

        .hero-left h1 {
            font-family: var(--font-heading);
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }

        .hero-left h1 .highlight {
            background: linear-gradient(135deg, #00E5A0 0%, #00c9e0 60%, #00E5A0 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            background-size: 200% auto;
            animation: shimmer-text 3s ease-in-out infinite;
        }

        @keyframes shimmer-text {
            0%,
            100% {
                background-position: 0% center;
            }
            50% {
                background-position: 200% center;
            }
        }

        .hero-left .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 480px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            color: #0A0E1A;
            background: linear-gradient(135deg, #00E5A0 0%, #00b8d4 100%);
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-smooth);
            border: none;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px) scale(1.03);
            filter: brightness(1.1);
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.98);
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.4);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            box-shadow: 0 0 0 rgba(0, 229, 160, 0);
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .btn-outline:hover {
            border-color: var(--accent-green);
            box-shadow: 0 0 22px rgba(0, 229, 160, 0.35);
            color: var(--accent-green);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
            box-shadow: 0 0 10px rgba(0, 229, 160, 0.2);
        }

        .hero-right {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            aspect-ratio: 4/5;
            max-height: 520px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-subtle);
        }

        .hero-right img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-xl);
        }

        .hero-right .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.25) 0%, rgba(10, 14, 26, 0.55) 100%);
            border-radius: var(--radius-xl);
            pointer-events: none;
        }

        .hero-right .floating-tag {
            position: absolute;
            bottom: 24px;
            left: 24px;
            background: rgba(10, 14, 26, 0.8);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-medium);
            border-radius: 20px;
            padding: 8px 18px;
            font-size: 0.85rem;
            color: #fff;
            font-weight: 600;
            letter-spacing: 0.3px;
            pointer-events: none;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header h2 {
            font-family: var(--font-heading);
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-green);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 8px;
        }

        /* ========== FEATURES GRID (2+3) ========== */
        .features-grid-top {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 24px;
        }

        .features-grid-bottom {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: var(--spacing-card-pad);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            opacity: 0;
            background: radial-gradient(ellipse at top left, rgba(0, 229, 160, 0.06) 0%, transparent 70%);
            transition: opacity var(--transition-smooth);
            pointer-events: none;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-focus);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-card .fc-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(0, 229, 160, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-green);
            margin-bottom: 18px;
            transition: all var(--transition-smooth);
        }

        .feature-card:hover .fc-icon {
            background: rgba(0, 229, 160, 0.18);
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.25);
        }

        .feature-card h3 {
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.2px;
        }

        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .feature-card.large {
            padding: 38px 36px;
        }

        .feature-card.large .fc-icon {
            width: 60px;
            height: 60px;
            font-size: 1.8rem;
        }

        .feature-card.large h3 {
            font-size: 1.4rem;
        }

        .feature-stat {
            display: flex;
            align-items: baseline;
            gap: 6px;
            margin-top: 14px;
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-green);
            font-family: var(--font-heading);
        }

        .feature-stat .unit {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        /* ========== CASES WATERFALL ========== */
        .cases-list {
            display: flex;
            flex-direction: column;
            gap: 48px;
        }

        .case-item {
            display: flex;
            align-items: center;
            gap: 36px;
            width: 50%;
            transition: transform var(--transition-smooth);
        }

        .case-item:nth-child(odd) {
            align-self: flex-start;
            flex-direction: row;
        }

        .case-item:nth-child(even) {
            align-self: flex-end;
            flex-direction: row-reverse;
        }

        .case-item:hover {
            transform: translateY(-4px);
        }

        .case-image-wrap {
            flex-shrink: 0;
            width: 46%;
            aspect-ratio: 4/3;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
        }

        .case-item:hover .case-image-wrap {
            border-color: var(--border-medium);
            box-shadow: var(--shadow-hover);
        }

        .case-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 16px;
            transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .case-item:hover .case-image-wrap img {
            transform: scale(1.06);
        }

        .case-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .case-info h3 {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.2px;
        }

        .case-info p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .case-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .case-tags .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(0, 229, 160, 0.08);
            color: var(--accent-green);
            border: 1px solid rgba(0, 229, 160, 0.18);
            letter-spacing: 0.3px;
        }

        /* ========== PRICING COMPARE ========== */
        .pricing-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: stretch;
        }

        .pricing-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .pricing-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .pricing-card.featured {
            border-color: rgba(0, 229, 160, 0.35);
            background: rgba(0, 229, 160, 0.03);
            box-shadow: 0 8px 36px rgba(0, 229, 160, 0.15);
        }

        .pricing-card .recommend-badge {
            position: absolute;
            top: -14px;
            right: 28px;
            background: linear-gradient(135deg, #FF6B3D 0%, #ff8a5c 100%);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 6px 18px;
            border-radius: 50px;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 16px rgba(255, 107, 61, 0.4);
            z-index: 2;
        }

        .pricing-card h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.3px;
        }

        .pricing-card .price-tag {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent-green);
            font-family: var(--font-heading);
            letter-spacing: 0.5px;
        }

        .pricing-card .price-tag .period {
            font-size: 0.85rem;
            font-weight: 400;
            color: var(--text-muted);
        }

        .pricing-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .pricing-card ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .pricing-card ul li i {
            color: var(--accent-green);
            font-size: 0.9rem;
            flex-shrink: 0;
            width: 18px;
            text-align: center;
        }

        .pricing-card .btn-primary {
            margin-top: auto;
            width: 100%;
            text-align: center;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }

        .faq-item.open {
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--border-medium);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
            gap: 16px;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.2px;
            transition: color var(--transition-fast);
            background: transparent;
            border: none;
        }

        .faq-question:hover {
            color: var(--accent-green);
        }

        .faq-q-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 229, 160, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.75rem;
            color: var(--accent-green);
            transition: all var(--transition-smooth);
        }

        .faq-item.open .faq-q-icon {
            background: rgba(0, 229, 160, 0.2);
            box-shadow: 0 0 14px rgba(0, 229, 160, 0.3);
        }

        .faq-toggle-icon {
            font-size: 1.2rem;
            color: var(--text-muted);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
            width: 24px;
            text-align: center;
        }

        .faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
            color: var(--accent-green);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px 24px;
        }

        .faq-answer-inner {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--border-subtle);
            padding-top: 14px;
        }

        /* ========== CONTACT CTA ========== */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .contact-left {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .contact-left h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            letter-spacing: 0.3px;
        }

        .contact-left p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 0.95rem;
            transition: all var(--transition-smooth);
            resize: vertical;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: var(--accent-green);
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.25);
            background: rgba(255, 255, 255, 0.05);
            outline: none;
        }

        .contact-form input::placeholder,
        .contact-form textarea::placeholder {
            color: rgba(255, 255, 255, 0.3);
        }

        .contact-form textarea {
            min-height: 100px;
        }

        .contact-form .btn-primary {
            width: 100%;
            padding: 16px;
            font-size: 1rem;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #070a14;
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 32px;
            margin-top: var(--spacing-section);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col p,
        .footer-col a {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 2;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-green);
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 8px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--text-muted);
            transition: all var(--transition-smooth);
            border: 1px solid var(--border-subtle);
        }

        .footer-social a:hover {
            background: rgba(0, 229, 160, 0.15);
            color: var(--accent-green);
            border-color: var(--accent-green);
            box-shadow: 0 0 14px rgba(0, 229, 160, 0.3);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ========== PARTICLES CANVAS ========== */
        #particles-canvas {
            position: fixed;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            opacity: 0.35;
        }

        main {
            position: relative;
            z-index: 1;
        }

        .site-header {
            z-index: 1000;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-right {
                max-height: 380px;
                aspect-ratio: 16/9;
                order: -1;
            }
            .hero-left h1 {
                font-size: 2.2rem;
            }
            .features-grid-top {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .features-grid-bottom {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .features-grid-bottom .feature-card:last-child {
                grid-column: 1 / -1;
                max-width: 400px;
                justify-self: center;
            }
            .case-item {
                width: 65%;
                gap: 20px;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .hero-section {
                padding-top: calc(var(--nav-height) + 24px);
                padding-bottom: 48px;
                min-height: auto;
            }
            .hero-left h1 {
                font-size: 1.75rem;
            }
            .hero-left .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .hero-right {
                max-height: 280px;
                aspect-ratio: 16/9;
            }
            .features-grid-top {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .features-grid-bottom {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .features-grid-bottom .feature-card:last-child {
                grid-column: auto;
                max-width: none;
                justify-self: auto;
            }
            .case-item,
            .case-item:nth-child(odd),
            .case-item:nth-child(even) {
                width: 100%;
                flex-direction: column;
                gap: 18px;
                align-self: flex-start;
            }
            .case-image-wrap {
                width: 100%;
                aspect-ratio: 16/9;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 100%;
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .contact-left h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section {
                padding: 60px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .section-header h2 {
                font-size: 1.55rem;
            }
            .feature-card {
                padding: 24px;
            }
            .feature-card.large {
                padding: 28px 24px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            :root {
                --spacing-section: 60px;
            }
        }

        @media (max-width: 520px) {
            .hero-left h1 {
                font-size: 1.45rem;
            }
            .hero-right {
                max-height: 220px;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .feature-card h3 {
                font-size: 1.1rem;
            }
            .case-info h3 {
                font-size: 1.1rem;
            }
            .pricing-card {
                padding: 24px 20px;
            }
            .pricing-card .price-tag {
                font-size: 1.8rem;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.9rem;
            }
            .contact-form input,
            .contact-form textarea {
                padding: 12px 14px;
            }
        }