/* roulang page: index */
:root {
            --bg-primary: #0B0E14;
            --bg-secondary: #111620;
            --bg-card: #1A1F2B;
            --bg-input: #161B26;
            --accent-green: #00E676;
            --accent-green-hover: #66FFA6;
            --accent-gold: #FFB300;
            --text-primary: #F5F7FA;
            --text-secondary: #8A92A6;
            --border-default: #2A3140;
            --border-focus: #00E676;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-full: 50px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 16px 48px rgba(0, 230, 118, 0.12), 0 8px 30px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 0 1px rgba(0, 230, 118, 0.25);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
            --transition-slow: 0.5s ease;
            --nav-height: 72px;
            --section-padding: 120px;
            --section-padding-mobile: 80px;
            --container-max: 1280px;
            --container-gap: 24px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
            transition: all var(--transition-smooth);
        }

        input,
        textarea {
            font-family: inherit;
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-gap);
        }

        /* ========== 导航 ========== */
        #mainNav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 14, 20, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            transition: background var(--transition-smooth);
        }

        #mainNav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-gap);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #FFFFFF;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: radial-gradient(circle at 40% 35%, #00E676 0%, #0B8043 70%, #0B0E14 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #0B0E14;
            font-weight: 900;
            position: relative;
            box-shadow: 0 0 18px rgba(0, 230, 118, 0.35);
        }

        .nav-logo .logo-icon::after {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            border: 2px solid rgba(0, 230, 118, 0.3);
            animation: logo-pulse 2.5s ease-in-out infinite;
        }

        @keyframes logo-pulse {
            0%,
            100% {
                transform: scale(1);
                opacity: 0.5;
            }
            50% {
                transform: scale(1.18);
                opacity: 0;
            }
        }

        .nav-logo .logo-text-highlight {
            color: var(--accent-green);
            font-weight: 700;
        }

        .nav-logo .logo-tm {
            font-size: 0.6rem;
            vertical-align: super;
            color: var(--text-secondary);
            font-weight: 400;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            font-weight: 500;
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-green);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-green);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-green);
            color: #0B0E14;
            font-weight: 600;
            font-size: 0.875rem;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition-smooth);
        }

        .nav-cta:hover {
            background: var(--accent-green-hover);
            transform: scale(1.04);
            box-shadow: 0 4px 20px rgba(0, 230, 118, 0.3);
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            padding: 8px;
            z-index: 1001;
            cursor: pointer;
        }

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

        .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);
        }

        .nav-mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(11, 14, 20, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

        .nav-mobile-overlay.active {
            opacity: 1;
            pointer-events: all;
        }

        .nav-mobile-overlay a {
            font-size: 1.3rem;
            color: var(--text-primary);
            font-weight: 500;
            transition: color var(--transition-fast);
        }

        .nav-mobile-overlay a:hover {
            color: var(--accent-green);
        }

        .nav-mobile-overlay .mobile-cta {
            margin-top: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-green);
            color: #0B0E14;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: var(--radius-full);
            transition: all var(--transition-smooth);
        }

        .nav-mobile-overlay .mobile-cta:hover {
            background: var(--accent-green-hover);
            transform: scale(1.04);
        }

        /* ========== Hero ========== */
        #hero {
            padding-top: calc(var(--nav-height) + 60px);
            padding-bottom: 80px;
            position: relative;
            overflow: hidden;
            background-color: var(--bg-primary);
        }

        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 230, 118, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 230, 118, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }

        #hero .hero-container {
            display: flex;
            align-items: center;
            gap: 48px;
            position: relative;
            z-index: 1;
        }

        .hero-left {
            flex: 0 0 55%;
            max-width: 55%;
        }

        .hero-right {
            flex: 0 0 45%;
            max-width: 45%;
            position: relative;
        }

        .hero-right .hero-img-wrapper {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .hero-right .hero-img-wrapper img {
            width: 100%;
            height: auto;
            display: block;
        }

        .hero-right .data-stream-overlay {
            position: absolute;
            inset: 0;
            pointer-events: none;
            background:
                radial-gradient(ellipse at 30% 20%, rgba(0, 230, 118, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(255, 179, 0, 0.05) 0%, transparent 50%);
        }

        .hero-right .floating-dot {
            position: absolute;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-green);
            box-shadow: 0 0 12px rgba(0, 230, 118, 0.7);
            animation: float-dot 6s ease-in-out infinite;
        }
        .hero-right .floating-dot:nth-child(2) {
            top: 15%;
            left: 80%;
            animation-delay: -2s;
            background: var(--accent-gold);
            box-shadow: 0 0 12px rgba(255, 179, 0, 0.7);
        }
        .hero-right .floating-dot:nth-child(3) {
            top: 60%;
            left: 10%;
            animation-delay: -4s;
            width: 4px;
            height: 4px;
        }
        .hero-right .floating-dot:nth-child(4) {
            top: 75%;
            left: 70%;
            animation-delay: -3s;
            width: 5px;
            height: 5px;
            background: var(--accent-gold);
            box-shadow: 0 0 10px rgba(255, 179, 0, 0.6);
        }

        @keyframes float-dot {
            0%,
            100% {
                transform: translate(0, 0);
                opacity: 0.6;
            }
            25% {
                transform: translate(30px, -20px);
                opacity: 1;
            }
            50% {
                transform: translate(-15px, 25px);
                opacity: 0.4;
            }
            75% {
                transform: translate(-25px, -10px);
                opacity: 0.8;
            }
        }

        .hero-left h1 {
            font-size: clamp(44px, 5.5vw, 72px);
            font-weight: 700;
            line-height: 1.12;
            color: #FFFFFF;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .hero-left h1 .highlight {
            color: var(--accent-green);
        }

        .hero-left .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 32px;
            max-width: 480px;
        }

        .hero-left .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-green);
            color: #0B0E14;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-full);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--accent-green-hover);
            transform: scale(1.03);
            box-shadow: 0 6px 24px rgba(0, 230, 118, 0.35);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-full);
            border: 1.5px solid var(--border-default);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
            box-shadow: 0 4px 18px rgba(0, 230, 118, 0.15);
        }

        .hero-live-stat {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(0, 230, 118, 0.08);
            border: 1px solid rgba(0, 230, 118, 0.2);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            font-size: 0.9rem;
            color: var(--accent-green);
            font-weight: 500;
        }

        .hero-live-stat .pulse-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--accent-green);
            animation: live-pulse 1.5s ease-in-out infinite;
        }

        @keyframes live-pulse {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.7);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(0, 230, 118, 0);
            }
        }

        .hero-live-stat .stat-number {
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 1.05rem;
        }

        /* ========== 指标看板 ========== */
        #metrics {
            padding: var(--section-padding) 0;
            background-color: var(--bg-secondary);
            position: relative;
        }

        #metrics .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        #metrics .section-header h2 {
            font-size: clamp(30px, 3.5vw, 48px);
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        #metrics .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 4px;
            background: var(--accent-green);
            border-radius: 2px;
        }

        #metrics .section-header .section-desc {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-top: 16px;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 32px;
        }

        .metric-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border-left: 3px solid var(--accent-green);
        }

        .metric-card.gold-border {
            border-left-color: var(--accent-gold);
        }

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

        .metric-card .metric-label {
            display: inline-block;
            background: rgba(0, 230, 118, 0.12);
            color: var(--accent-green);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .metric-card.gold-border .metric-label {
            background: rgba(255, 179, 0, 0.12);
            color: var(--accent-gold);
        }

        .metric-card .metric-value {
            font-family: var(--font-mono);
            font-size: clamp(40px, 5vw, 56px);
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1;
            margin-bottom: 10px;
        }

        .metric-card .metric-trend {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            color: var(--accent-green);
            font-weight: 500;
        }

        .metric-card .metric-trend .arrow-up {
            display: inline-block;
            width: 0;
            height: 0;
            border-left: 6px solid transparent;
            border-right: 6px solid transparent;
            border-bottom: 9px solid var(--accent-green);
        }

        .metrics-bar {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .metrics-bar .bar-label {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 1rem;
            white-space: nowrap;
        }

        .metrics-bar .bar-track {
            flex: 1;
            min-width: 200px;
            height: 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            overflow: hidden;
            position: relative;
        }

        .metrics-bar .bar-fill {
            height: 100%;
            background: var(--accent-green);
            border-radius: 10px;
            transition: width 1.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
            min-width: 0;
        }

        .metrics-bar .bar-fill::after {
            content: '';
            position: absolute;
            right: 0;
            top: 0;
            bottom: 0;
            width: 30px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
            border-radius: 10px;
        }

        .metrics-bar .bar-value {
            font-family: var(--font-mono);
            font-weight: 700;
            color: var(--accent-gold);
            font-size: 1.2rem;
            white-space: nowrap;
        }

        .metrics-bar .bar-compare {
            font-size: 0.85rem;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .metrics-cta {
            text-align: center;
            margin-top: 36px;
        }

        /* ========== 服务矩阵 ========== */
        #services {
            padding: var(--section-padding) 0;
            background-color: var(--bg-primary);
        }

        #services .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        #services .section-header h2 {
            font-size: clamp(30px, 3.5vw, 48px);
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        #services .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 4px;
            background: var(--accent-green);
            border-radius: 2px;
        }

        #services .section-header .section-desc {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-top: 16px;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            cursor: default;
        }

        .service-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-green);
            transition: width var(--transition-smooth);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
        }

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

        .service-card:hover::after {
            width: 100%;
        }

        .service-card.card-wide {
            grid-column: span 6;
        }

        .service-card.card-small {
            grid-column: span 4;
        }

        .service-card .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 230, 118, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 22px;
            color: var(--accent-green);
            flex-shrink: 0;
        }

        .service-card .service-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--accent-green);
            fill: none;
            stroke-width: 2;
        }

        .service-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .service-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex-grow: 1;
            margin-bottom: 12px;
        }

        .service-card .service-link {
            font-size: 0.9rem;
            color: var(--accent-green);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            opacity: 0;
            transform: translateX(-8px);
            transition: all var(--transition-smooth);
            pointer-events: none;
        }

        .service-card:hover .service-link {
            opacity: 1;
            transform: translateX(0);
        }

        .service-card.card-image {
            padding: 0;
            overflow: hidden;
        }
        .service-card.card-image img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .service-card.card-image .card-image-body {
            padding: 20px 24px 24px;
        }

        .service-card.card-list {
            padding: 28px 24px;
        }
        .service-card.card-list ul {
            list-style: none;
            padding: 0;
        }
        .service-card.card-list ul li {
            padding: 8px 0;
            color: var(--text-secondary);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .service-card.card-list ul li:last-child {
            border-bottom: none;
        }
        .service-card.card-list ul li::before {
            content: '';
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent-green);
            flex-shrink: 0;
        }

        /* ========== 对比 ========== */
        #comparison {
            padding: var(--section-padding) 0;
            background-color: var(--bg-secondary);
        }

        #comparison .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        #comparison .section-header h2 {
            font-size: clamp(30px, 3.5vw, 48px);
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        #comparison .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 4px;
            background: var(--accent-green);
            border-radius: 2px;
        }

        #comparison .section-header .section-desc {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-top: 16px;
        }

        .comparison-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            max-width: 800px;
            margin: 0 auto;
        }

        .comparison-row {
            display: flex;
            align-items: center;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            gap: 16px;
        }

        .comparison-row:last-child {
            border-bottom: none;
        }

        .comparison-row .comp-label {
            flex: 0 0 120px;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }

        .comparison-row .comp-bar-wrapper {
            flex: 1;
            display: flex;
            align-items: center;
            gap: 10px;
            min-width: 160px;
        }

        .comparison-row .comp-bar {
            height: 14px;
            border-radius: 7px;
            transition: width 1.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
        }

        .comp-bar.our-bar {
            background: var(--accent-green);
        }

        .comp-bar.avg-bar {
            background: rgba(138, 146, 166, 0.4);
        }

        .comparison-row .comp-value {
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 0.95rem;
            white-space: nowrap;
            min-width: 60px;
            text-align: right;
        }

        .comp-value.our-value {
            color: var(--accent-green);
        }
        .comp-value.avg-value {
            color: var(--text-secondary);
        }

        .comparison-row .comp-tag {
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            white-space: nowrap;
        }

        .comp-tag.tag-our {
            background: rgba(0, 230, 118, 0.15);
            color: var(--accent-green);
        }
        .comp-tag.tag-avg {
            background: rgba(138, 146, 166, 0.15);
            color: var(--text-secondary);
        }

        .comparison-note {
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin-top: 16px;
            opacity: 0.7;
        }

        /* ========== FAQ ========== */
        #faq {
            padding: var(--section-padding) 0;
            background-color: var(--bg-primary);
        }

        #faq .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        #faq .section-header h2 {
            font-size: clamp(30px, 3.5vw, 48px);
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        #faq .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 4px;
            background: var(--accent-green);
            border-radius: 2px;
        }

        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition-fast);
        }

        .faq-item.active {
            background: rgba(255, 255, 255, 0.015);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            background: none;
            padding: 18px 0;
            color: var(--text-primary);
            font-size: 1.05rem;
            font-weight: 500;
            text-align: left;
            cursor: pointer;
            gap: 12px;
        }

        .faq-question .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: 2px solid var(--accent-green);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-smooth);
            font-size: 1.1rem;
            color: var(--accent-green);
            font-weight: 600;
        }

        .faq-item.active .faq-question .faq-icon {
            background: var(--accent-green);
            color: #0B0E14;
            border-color: var(--accent-green);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.45s ease;
            padding: 0 0;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 0 18px 0;
        }

        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            padding-left: 44px;
        }

        /* ========== 表单 ========== */
        #contact {
            padding: var(--section-padding) 0;
            background-color: var(--bg-secondary);
            position: relative;
        }

        #contact::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 20% 50%, rgba(0, 230, 118, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 50%, rgba(255, 179, 0, 0.03) 0%, transparent 50%);
            pointer-events: none;
        }

        #contact .contact-container {
            display: flex;
            gap: 48px;
            align-items: flex-start;
            position: relative;
            z-index: 1;
        }

        .contact-left {
            flex: 0 0 38%;
        }

        .contact-left h2 {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .contact-left .contact-trust {
            font-size: 0.95rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 8px;
        }

        .contact-left .contact-trust .trust-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 230, 118, 0.08);
            border: 1px solid rgba(0, 230, 118, 0.2);
            border-radius: var(--radius-full);
            padding: 6px 14px;
            font-size: 0.85rem;
            color: var(--accent-green);
            font-weight: 500;
        }

        .contact-right {
            flex: 1;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(255, 255, 255, 0.04);
        }

        .contact-right .form-row {
            display: flex;
            gap: 14px;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .contact-right .form-group {
            flex: 1;
            min-width: 140px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .contact-right label {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .contact-right input,
        .contact-right textarea {
            background: var(--bg-input);
            border: 1.5px solid var(--border-default);
            border-radius: var(--radius-sm);
            padding: 12px 14px;
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            width: 100%;
        }

        .contact-right input:focus,
        .contact-right textarea:focus {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.1);
        }

        .contact-right textarea {
            resize: vertical;
            min-height: 100px;
        }

        .contact-right .form-checkbox {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin: 8px 0 20px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            cursor: pointer;
        }

        .contact-right .form-checkbox input {
            width: auto;
            accent-color: var(--accent-green);
            margin-top: 3px;
            cursor: pointer;
            flex-shrink: 0;
        }

        .btn-submit {
            width: 100%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-green);
            color: #0B0E14;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-full);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .btn-submit:hover {
            background: var(--accent-green-hover);
            box-shadow: 0 6px 24px rgba(0, 230, 118, 0.35);
        }

        .btn-submit.submitted {
            background: #1B5E20;
            color: #C8E6C9;
            pointer-events: none;
            animation: submit-pulse 0.6s ease;
        }

        @keyframes submit-pulse {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.04);
            }
        }

        .form-success-msg {
            display: none;
            text-align: center;
            color: var(--accent-green);
            font-weight: 500;
            margin-top: 12px;
            font-size: 0.95rem;
        }

        .form-success-msg.visible {
            display: block;
            animation: fadeInUp 0.5s ease;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ========== 页脚 ========== */
        footer {
            background-color: #080B10;
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        footer .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        footer .footer-brand .footer-logo .ft-highlight {
            color: var(--accent-green);
        }

        footer .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        footer .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        footer .footer-links a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

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

        footer .footer-contact {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 2;
        }

        footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        /* ========== 入场动画 ========== */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .hero-left {
                flex: 0 0 52%;
                max-width: 52%;
            }
            .hero-right {
                flex: 0 0 48%;
                max-width: 48%;
            }
            .service-card.card-wide {
                grid-column: span 6;
            }
            .service-card.card-small {
                grid-column: span 4;
            }
            #contact .contact-container {
                flex-direction: column;
                gap: 32px;
            }
            .contact-left {
                flex: auto;
                text-align: center;
            }
            footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 80px;
            }
            #mainNav .nav-links {
                display: none;
            }
            #mainNav .nav-cta {
                display: none;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-mobile-overlay {
                display: flex;
            }
            #hero {
                padding-top: calc(var(--nav-height) + 30px);
                padding-bottom: 50px;
            }
            #hero .hero-container {
                flex-direction: column;
                text-align: center;
            }
            .hero-left {
                flex: auto;
                max-width: 100%;
                order: 1;
            }
            .hero-right {
                flex: auto;
                max-width: 100%;
                order: 0;
                margin-bottom: 28px;
                max-width: 380px;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-left .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-left .hero-buttons {
                justify-content: center;
            }
            .hero-left .hero-live-stat {
                display: inline-flex;
                margin: 0 auto;
            }
            .hero-left h1 {
                font-size: clamp(34px, 7vw, 48px);
            }
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .services-grid {
                grid-template-columns: 1fr;
            }
            .service-card.card-wide,
            .service-card.card-small {
                grid-column: span 1;
            }
            .comparison-row {
                flex-wrap: wrap;
                gap: 8px;
            }
            .comparison-row .comp-label {
                flex: 0 0 100%;
            }
            .contact-right .form-row {
                flex-direction: column;
                gap: 14px;
            }
            footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            footer .footer-links {
                align-items: center;
            }
            .metrics-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .hero-left h1 {
                font-size: clamp(28px, 8vw, 36px);
            }
            .hero-left .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            .hero-left .hero-buttons .btn-primary,
            .hero-left .hero-buttons .btn-secondary {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .metric-card .metric-value {
                font-size: 36px;
            }
            .comparison-card {
                padding: 20px 14px;
            }
            .contact-right {
                padding: 22px 16px;
            }
        }