/* roulang page: index */
:root {
            --neon: #00F0FF;
            --purple: #8B5CF6;
            --magenta: #F500A0;
            --bg-dark: #0B0D17;
            --bg-mid: #131627;
            --bg-light: #1A1E2E;
            --text-primary: #FFFFFF;
            --text-secondary: #CAD0E0;
            --text-muted: #8892B0;
            --radius-card: 12px;
            --radius-input: 8px;
            --shadow-neon: 0 0 18px rgba(0, 240, 255, 0.35);
            --shadow-neon-strong: 0 0 28px rgba(0, 240, 255, 0.55);
            --shadow-magenta: 0 0 24px rgba(245, 0, 160, 0.3);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            background: var(--bg-dark);
            background-image: linear-gradient(180deg, #0B0D17 0%, #131627 100%);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 3px;
            border-radius: 4px;
        }
        input {
            font-family: inherit;
            outline: none;
            border-radius: var(--radius-input);
            transition: all 0.3s ease;
        }
        input:focus {
            border-color: var(--neon) !important;
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.3) !important;
        }

        ::selection {
            background: rgba(0, 240, 255, 0.25);
            color: #fff;
        }

        /* ========== HEADER / NAV ========== */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: transparent;
            transition: all 0.35s ease;
            border-bottom: 1px solid transparent;
        }
        #site-header.scrolled {
            background: rgba(11, 13, 23, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--neon);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            max-width: 1260px;
            width: 100%;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            position: relative;
            flex-shrink: 0;
        }
        .logo-icon svg {
            width: 100%;
            height: 100%;
        }
        .logo-text {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 1.35rem;
            color: #fff;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--neon);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            transition: color 0.25s;
            letter-spacing: 0.02em;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--neon);
            border-radius: 1px;
            transition: width 0.3s ease;
        }
        .nav-links a:hover {
            color: #fff;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--neon);
            color: #0B0D17 !important;
            font-weight: 700;
            border-radius: var(--radius-card);
            font-size: 0.9rem;
            letter-spacing: 0.03em;
            transition: all 0.3s ease;
            white-space: nowrap;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.25);
        }
        .nav-cta-btn:hover {
            background: #33F5FF;
            box-shadow: var(--shadow-neon-strong);
            transform: scale(1.04);
            color: #0B0D17 !important;
        }
        .nav-cta-btn::after {
            display: none !important;
        }

        /* Hamburger */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            width: 36px;
            height: 28px;
            position: relative;
            cursor: pointer;
            z-index: 1100;
            flex-direction: column;
            justify-content: space-between;
            padding: 0;
        }
        .hamburger-btn span {
            display: block;
            width: 100%;
            height: 2.5px;
            background: var(--neon);
            border-radius: 3px;
            transition: all 0.35s ease;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(11px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-11px) rotate(-45deg);
        }
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(11, 13, 23, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 1050;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu a {
            font-size: 1.5rem;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.04em;
            transition: color 0.25s;
            padding: 8px 16px;
        }
        .mobile-menu a:active {
            color: var(--neon);
        }
        .mobile-menu .mobile-cta {
            margin-top: 16px;
            padding: 14px 36px;
            background: var(--neon);
            color: #0B0D17;
            font-weight: 700;
            border-radius: var(--radius-card);
            font-size: 1.1rem;
            box-shadow: var(--shadow-neon);
        }

        /* ========== HERO ========== */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 100px 24px 60px;
            overflow: hidden;
        }
        .hero-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(120px);
            opacity: 0.45;
            pointer-events: none;
            z-index: 0;
            animation: orbDrift 18s ease-in-out infinite;
        }
        .hero-orb.orb-1 {
            width: 500px;
            height: 500px;
            background: rgba(139, 92, 246, 0.5);
            top: -10%;
            left: -8%;
            animation-delay: 0s;
        }
        .hero-orb.orb-2 {
            width: 400px;
            height: 400px;
            background: rgba(245, 0, 160, 0.35);
            bottom: -8%;
            right: -5%;
            animation-delay: -6s;
            animation-duration: 22s;
        }
        .hero-orb.orb-3 {
            width: 350px;
            height: 350px;
            background: rgba(0, 240, 255, 0.3);
            top: 45%;
            left: 50%;
            animation-delay: -12s;
            animation-duration: 20s;
        }
        @keyframes orbDrift {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            25% {
                transform: translate(60px, -40px) scale(1.12);
            }
            50% {
                transform: translate(-30px, 50px) scale(0.92);
            }
            75% {
                transform: translate(-50px, -30px) scale(1.08);
            }
        }
        .hero-particle {
            position: absolute;
            width: 3px;
            height: 3px;
            background: var(--neon);
            border-radius: 50%;
            pointer-events: none;
            z-index: 1;
            opacity: 0.7;
            animation: particleFloat 8s ease-in-out infinite;
        }
        @keyframes particleFloat {
            0%,
            100% {
                transform: translateY(0) translateX(0);
                opacity: 0.3;
            }
            25% {
                transform: translateY(-60px) translateX(30px);
                opacity: 0.9;
            }
            50% {
                transform: translateY(-20px) translateX(-25px);
                opacity: 0.5;
            }
            75% {
                transform: translateY(-80px) translateX(15px);
                opacity: 0.8;
            }
        }
        .hero-inner {
            max-width: 1260px;
            width: 100%;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-text h1 {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 48px;
            line-height: 1.2;
            color: #fff;
            margin: 0 0 20px;
            letter-spacing: 0.02em;
        }
        .hero-text h1 .highlight {
            color: var(--neon);
            text-shadow: 0 0 40px rgba(0, 240, 255, 0.5);
        }
        .hero-text .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin: 0 0 36px;
            line-height: 1.8;
            max-width: 480px;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--neon);
            color: #0B0D17;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-card);
            letter-spacing: 0.03em;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            transition: all 0.35s ease;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: #33F5FF;
            box-shadow: var(--shadow-neon-strong);
            transform: scale(1.05);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: var(--neon);
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-card);
            border: 2px solid var(--neon);
            letter-spacing: 0.03em;
            transition: all 0.35s ease;
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
            border-color: #33F5FF;
            color: #33F5FF;
        }
        .hero-mockup {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-mockup .mockup-frame {
            width: 100%;
            max-width: 540px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.2), 0 20px 60px rgba(0, 0, 0, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.1);
            animation: mockupFloat 6s ease-in-out infinite;
            position: relative;
            z-index: 2;
        }
        @keyframes mockupFloat {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-16px);
            }
        }
        .hero-mockup .mockup-frame img {
            width: 100%;
            display: block;
        }
        .mockup-glow {
            position: absolute;
            width: 200px;
            height: 200px;
            background: rgba(0, 240, 255, 0.25);
            border-radius: 50%;
            filter: blur(80px);
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            pointer-events: none;
            z-index: 1;
            animation: glowPulse 4s ease-in-out infinite;
        }
        @keyframes glowPulse {
            0%,
            100% {
                opacity: 0.5;
                transform: translate(-50%, -50%) scale(1);
            }
            50% {
                opacity: 0.9;
                transform: translate(-50%, -50%) scale(1.3);
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 100px 24px;
            position: relative;
            z-index: 2;
        }
        .section-alt {
            background: rgba(255, 255, 255, 0.015);
        }
        .section-inner {
            max-width: 1260px;
            margin: 0 auto;
            width: 100%;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--neon);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 36px;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: 0.02em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin: 0 0 48px;
            max-width: 600px;
            line-height: 1.7;
        }
        .section-header-center {
            text-align: center;
        }
        .section-header-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== FEATURES ========== */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1.15fr 1fr;
            gap: 32px;
            align-items: start;
        }
        .feature-card {
            background: rgba(19, 22, 39, 0.8);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            border: 1px solid rgba(139, 92, 246, 0.3);
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card.featured {
            border: 2px solid transparent;
            background: rgba(19, 22, 39, 0.9);
            background-clip: padding-box;
            position: relative;
            transform: translateY(-12px);
            z-index: 3;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
        }
        .feature-card.featured::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: calc(var(--radius-card) + 2px);
            background: linear-gradient(135deg, var(--neon), var(--purple), var(--neon));
            z-index: -1;
            opacity: 0.8;
            animation: borderShimmer 4s linear infinite;
        }
        @keyframes borderShimmer {
            0%,
            100% {
                opacity: 0.7;
            }
            50% {
                opacity: 1;
            }
        }
        .feature-card:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: var(--shadow-neon);
            transform: translateY(-6px);
        }
        .feature-card.featured:hover {
            transform: translateY(-16px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.4);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--neon);
            font-size: 2rem;
        }
        .feature-card h3 {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 1.25rem;
            color: #fff;
            margin: 0 0 10px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }
        .feature-indicator {
            margin-top: 18px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .feature-indicator .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--neon);
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
            animation: dotBlink 1.5s ease-in-out infinite;
        }
        .feature-indicator .dot:nth-child(2) {
            animation-delay: 0.3s;
            background: var(--purple);
            box-shadow: 0 0 8px rgba(139, 92, 246, 0.6);
        }
        .feature-indicator .dot:nth-child(3) {
            animation-delay: 0.6s;
            background: var(--magenta);
            box-shadow: 0 0 8px rgba(245, 0, 160, 0.6);
        }
        @keyframes dotBlink {
            0%,
            100% {
                opacity: 0.4;
            }
            50% {
                opacity: 1;
            }
        }
        .feature-data-bar {
            margin-top: 16px;
            height: 3px;
            border-radius: 2px;
            background: rgba(255, 255, 255, 0.08);
            overflow: hidden;
        }
        .feature-data-bar .fill {
            height: 100%;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--neon), var(--purple));
            animation: barFill 3s ease-in-out infinite;
        }
        @keyframes barFill {
            0%,
            100% {
                width: 60%;
            }
            50% {
                width: 92%;
            }
        }

        /* ========== SCENARIOS ========== */
        .scenario-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 64px;
        }
        .scenario-row:last-child {
            margin-bottom: 0;
        }
        .scenario-row.reverse .scenario-img-wrap {
            order: 1;
        }
        .scenario-row.reverse .scenario-text {
            order: 0;
        }
        .scenario-img-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
        }
        .scenario-img-wrap img {
            width: 100%;
            display: block;
            border-radius: var(--radius-card);
        }
        .scenario-img-overlay {
            position: absolute;
            inset: 0;
            background: rgba(139, 92, 246, 0.25);
            border-radius: var(--radius-card);
            pointer-events: none;
        }
        .scenario-text {
            position: relative;
            padding-left: 24px;
        }
        .scenario-text::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            width: 4px;
            height: 50px;
            background: var(--neon);
            border-radius: 2px;
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.5);
        }
        .scenario-text h3 {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 1.5rem;
            color: #fff;
            margin: 0 0 12px;
        }
        .scenario-text p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0 0 16px;
            line-height: 1.7;
        }
        .scenario-stat {
            display: inline-flex;
            align-items: baseline;
            gap: 4px;
            font-weight: 700;
            font-size: 2rem;
            color: var(--neon);
            letter-spacing: 0.02em;
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
        }
        .scenario-stat small {
            font-size: 1rem;
            color: var(--text-muted);
            font-weight: 400;
            text-shadow: none;
        }

        /* ========== CASES ========== */
        #cases {
            position: relative;
            overflow: hidden;
        }
        #cases .grid-bg {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            opacity: 0.06;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.15) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.15) 1px, transparent 1px);
            background-size: 50px 50px;
        }
        .cases-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 16px;
            position: relative;
            z-index: 2;
        }
        .cases-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .cases-scroll::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.04);
            border-radius: 4px;
        }
        .cases-scroll::-webkit-scrollbar-thumb {
            background: var(--neon);
            border-radius: 4px;
        }
        .case-card {
            flex: 0 0 340px;
            scroll-snap-align: start;
            background: rgba(19, 22, 39, 0.85);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .case-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-neon);
        }
        .case-logo-placeholder {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--neon);
            letter-spacing: 0.05em;
            opacity: 0.8;
        }
        .case-quote {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            font-style: italic;
        }

        /* ========== PRICING ========== */
        .pricing-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
            align-items: stretch;
        }
        .pricing-card {
            background: rgba(19, 22, 39, 0.8);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.4s ease;
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .pricing-card:hover {
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.18);
        }
        .pricing-card.featured-plan {
            transform: scale(1.06);
            z-index: 4;
            border: 2px solid transparent;
            background: rgba(19, 22, 39, 0.95);
            background-clip: padding-box;
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.25);
            position: relative;
        }
        .pricing-card.featured-plan::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: calc(var(--radius-card) + 2px);
            background: linear-gradient(135deg, var(--neon), var(--purple), var(--magenta), var(--neon));
            z-index: -1;
            opacity: 0.85;
            animation: borderShimmer 4s linear infinite;
        }
        .pricing-badge {
            position: absolute;
            top: -14px;
            right: 24px;
            background: var(--magenta);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 20px;
            letter-spacing: 0.05em;
            box-shadow: var(--shadow-magenta);
            z-index: 5;
            animation: badgePulse 2.5s ease-in-out infinite;
        }
        @keyframes badgePulse {
            0%,
            100% {
                box-shadow: 0 0 18px rgba(245, 0, 160, 0.35);
            }
            50% {
                box-shadow: 0 0 32px rgba(245, 0, 160, 0.65);
            }
        }
        .pricing-card h3 {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            margin: 0 0 8px;
        }
        .pricing-price {
            font-weight: 700;
            font-size: 3rem;
            color: var(--neon);
            letter-spacing: 0.02em;
            margin: 8px 0 20px;
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
        }
        .pricing-price small {
            font-size: 1rem;
            color: var(--text-muted);
            font-weight: 400;
            text-shadow: none;
        }
        .pricing-features {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            flex-grow: 1;
        }
        .pricing-features li {
            font-size: 0.9rem;
            color: var(--text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .pricing-features li i {
            color: var(--neon);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .pricing-features li.disabled {
            color: var(--text-muted);
            opacity: 0.45;
        }
        .pricing-features li.disabled i {
            color: var(--text-muted);
            opacity: 0.5;
        }
        .pricing-card .btn-primary {
            width: 100%;
            justify-content: center;
        }
        .pricing-card .btn-outline {
            width: 100%;
            justify-content: center;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            transition: background 0.3s ease;
        }
        .faq-item.active {
            background: rgba(255, 255, 255, 0.025);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 8px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 600;
            font-size: 1.05rem;
            color: #fff;
            letter-spacing: 0.02em;
            transition: color 0.3s;
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--neon);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: var(--neon);
            font-size: 1rem;
            transition: all 0.35s ease;
            position: relative;
        }
        .faq-item.active .faq-icon {
            background: rgba(0, 240, 255, 0.15);
            border-color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        }
        .faq-icon .icon-line {
            position: absolute;
            width: 12px;
            height: 2px;
            background: var(--neon);
            border-radius: 1px;
            transition: all 0.35s ease;
        }
        .faq-icon .icon-line.h {
            transform: rotate(90deg);
        }
        .faq-item.active .faq-icon .icon-line.h {
            transform: rotate(0deg);
            opacity: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.45s ease;
            padding: 0 8px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 8px 20px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0;
            max-width: 640px;
        }

        /* ========== CTA BOTTOM ========== */
        #contact {
            text-align: center;
            position: relative;
            z-index: 2;
        }
        #contact .orb-bg {
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(139, 92, 246, 0.3);
            border-radius: 50%;
            filter: blur(100px);
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            pointer-events: none;
            z-index: 0;
        }
        .cta-box {
            position: relative;
            z-index: 2;
            max-width: 600px;
            margin: 0 auto;
            padding: 48px 32px;
            background: rgba(19, 22, 39, 0.7);
            border-radius: var(--radius-card);
            border: 1px solid rgba(0, 240, 255, 0.25);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.1);
        }
        .cta-box h2 {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
            font-weight: 700;
            font-size: 2rem;
            color: #fff;
            margin: 0 0 12px;
        }
        .cta-box p {
            color: var(--text-muted);
            margin: 0 0 28px;
            font-size: 1rem;
        }
        .cta-box .btn-primary {
            font-size: 1.1rem;
            padding: 16px 40px;
        }

        /* ========== FOOTER ========== */
        #site-footer {
            background: rgba(11, 13, 23, 0.95);
            padding: 48px 24px 24px;
            position: relative;
            z-index: 2;
            border-top: 1px solid rgba(0, 240, 255, 0.3);
        }
        .footer-inner {
            max-width: 1260px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: start;
        }
        .footer-brand .logo-text {
            font-size: 1.2rem;
            margin-bottom: 8px;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 4px 0 0;
            line-height: 1.6;
        }
        .footer-social {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--neon);
            font-size: 1.1rem;
            transition: all 0.3s ease;
        }
        .footer-social a:hover {
            border-color: var(--magenta);
            color: var(--magenta);
            box-shadow: 0 0 16px rgba(245, 0, 160, 0.35);
            transform: translateY(-3px);
        }
        .footer-copyright {
            max-width: 1260px;
            margin: 24px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1280px) {
            .hero-inner {
                gap: 32px;
            }
            .hero-text h1 {
                font-size: 40px;
            }
            .features-grid {
                gap: 20px;
            }
            .pricing-grid {
                gap: 20px;
            }
            .pricing-card {
                padding: 28px 20px;
            }
            .pricing-price {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-text {
                order: 0;
            }
            .hero-mockup {
                order: 1;
            }
            .hero-text .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-btns {
                justify-content: center;
            }
            .hero-text h1 {
                font-size: 36px;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .feature-card.featured {
                transform: translateY(0);
                grid-column: span 2;
                order: -1;
            }
            .feature-card.featured:hover {
                transform: translateY(-8px);
            }
            .scenario-row {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .scenario-row.reverse .scenario-img-wrap {
                order: 0;
            }
            .scenario-row.reverse .scenario-text {
                order: 0;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 440px;
                margin: 0 auto;
                gap: 24px;
            }
            .pricing-card.featured-plan {
                transform: scale(1);
                order: -1;
            }
            .pricing-card.featured-plan:hover {
                transform: scale(1.03);
            }
            .nav-links {
                gap: 18px;
            }
            .nav-links a {
                font-size: 0.85rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 20px;
            }
            .footer-social {
                justify-content: center;
            }
        }
        @media (max-width: 768px) {
            #site-header {
                height: 60px;
                padding: 0 16px;
            }
            .nav-links {
                display: none;
            }
            .nav-cta-btn {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .hero-text h1 {
                font-size: 32px;
            }
            .hero-text .hero-subtitle {
                font-size: 1rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 24px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .hero-btns {
                flex-direction: column;
                width: 100%;
            }
            .section {
                padding: 64px 16px;
            }
            .section-title {
                font-size: 26px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card.featured {
                grid-column: span 1;
                transform: translateY(0);
            }
            .feature-card.featured:hover {
                transform: translateY(-6px);
            }
            .feature-card:hover {
                transform: translateY(-4px);
            }
            .case-card {
                flex: 0 0 280px;
            }
            .pricing-card.featured-plan {
                transform: scale(1);
            }
            .pricing-card.featured-plan:hover {
                transform: scale(1.02);
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 16px 4px;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .scenario-text h3 {
                font-size: 1.25rem;
            }
            .scenario-stat {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 640px) {
            .hero-text h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .pricing-price {
                font-size: 2rem;
            }
            .case-card {
                flex: 0 0 240px;
            }
            .hero-mockup .mockup-frame {
                max-width: 100%;
            }
            .logo-text {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
            }
        }
        @media (hover: none) {
            .feature-card:hover {
                transform: none;
                box-shadow: none;
            }
            .feature-card.featured:hover {
                transform: none;
            }
            .pricing-card:hover {
                box-shadow: none;
            }
            .case-card:hover {
                box-shadow: none;
            }
            .feature-card:active {
                border-color: rgba(0, 240, 255, 0.6);
                box-shadow: var(--shadow-neon);
            }
            .pricing-card:active {
                border-color: rgba(0, 240, 255, 0.5);
            }
            .case-card:active {
                border-color: rgba(0, 240, 255, 0.5);
            }
        }