/* roulang page: index */
:root {
            --bg-primary: #0B0E14;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.09);
            --accent-cyan: #00F2FE;
            --accent-teal: #0CD6D6;
            --accent-blue: #00B4D6;
            --text-primary: #EAF0FB;
            --text-secondary: #8892B0;
            --gold: #F5C542;
            --success: #2ED87A;
            --danger: #FF4D6D;
            --card-border: rgba(0, 242, 254, 0.25);
            --card-border-hover: rgba(0, 242, 254, 0.55);
            --card-shadow: 0 8px 32px rgba(0, 242, 254, 0.08);
            --card-shadow-hover: 0 12px 40px rgba(0, 242, 254, 0.22);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-btn: 30px;
            --radius-input: 12px;
            --glow-cyan: 0 0 18px rgba(0, 242, 254, 0.6);
            --glow-cyan-strong: 0 0 28px rgba(0, 242, 254, 0.85);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'Inter', 'SF Pro Text', 'SF Mono', monospace;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-smooth);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        input {
            font-family: inherit;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ 导航栏 ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 14px 0;
            transition: all var(--transition-smooth);
            background: transparent;
        }
        .site-header.scrolled {
            background: rgba(11, 14, 20, 0.82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 242, 254, 0.18);
            padding: 10px 0;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 22px;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            text-decoration: none;
            flex-shrink: 0;
        }
        .logo-link:hover {
            color: #fff;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 900;
            color: #0B0E14;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 242, 254, 0.45);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-desktop a {
            font-size: 15px;
            font-weight: 500;
            color: #c8d0e0;
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-smooth);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 1px;
            transition: width var(--transition-smooth);
        }
        .nav-desktop a:hover::after,
        .nav-desktop a.active::after {
            width: 100%;
        }
        .nav-desktop a:hover,
        .nav-desktop a.active {
            color: #fff;
        }
        .nav-cta-btn {
            display: inline-block;
            padding: 9px 22px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
            color: #0B0E14 !important;
            font-weight: 700;
            font-size: 14px;
            box-shadow: var(--glow-cyan);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            box-shadow: var(--glow-cyan-strong);
            transform: scale(1.05);
            color: #0B0E14 !important;
        }
        .nav-cta-btn::after {
            display: none !important;
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            flex-shrink: 0;
        }
        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            margin: 6px 0;
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }
        .mobile-nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 8, 14, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            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: 22px;
            font-weight: 600;
            color: #c8d0e0;
            transition: color var(--transition-smooth);
        }
        .mobile-nav-overlay a:hover {
            color: var(--accent-cyan);
        }
        .mobile-nav-cta {
            margin-top: 10px;
            padding: 13px 36px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
            color: #0B0E14 !important;
            font-weight: 700;
            font-size: 17px;
            box-shadow: var(--glow-cyan);
        }

        /* ============ Hero ============ */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding-top: 80px;
            background: radial-gradient(ellipse at 30% 50%, #001F3F 0%, #0B0E14 70%);
        }
        .hero-particles {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            pointer-events: none;
            z-index: 0;
        }
        .particle {
            position: absolute;
            border-radius: 50%;
            background: rgba(0, 242, 254, 0.3);
            animation: floatUp 6s infinite ease-in-out;
        }
        @keyframes floatUp {
            0%,
            100% {
                transform: translateY(0) translateX(0) scale(1);
                opacity: 0.35;
            }
            25% {
                transform: translateY(-40px) translateX(20px) scale(1.3);
                opacity: 0.7;
            }
            50% {
                transform: translateY(-80px) translateX(-10px) scale(1);
                opacity: 0.3;
            }
            75% {
                transform: translateY(-40px) translateX(-25px) scale(1.2);
                opacity: 0.6;
            }
        }
        .hero-grid-pattern {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            opacity: 0.04;
            background-image:
                linear-gradient(rgba(0, 242, 254, 0.5) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 242, 254, 0.5) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 24px;
        }
        .hero-text h1 {
            font-family: var(--font-heading);
            font-size: 48px;
            font-weight: 700;
            line-height: 1.2;
            color: #EEF5FF;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .hero-text h1 .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 15px 34px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
            color: #0B0E14;
            font-weight: 700;
            font-size: 17px;
            box-shadow: var(--glow-cyan);
            transition: all var(--transition-smooth);
            white-space: nowrap;
            animation: btnPulse 2.4s infinite ease-in-out;
        }
        .btn-primary:hover {
            box-shadow: var(--glow-cyan-strong);
            transform: scale(1.05);
            color: #0B0E14;
        }
        @keyframes btnPulse {
            0%,
            100% {
                box-shadow: 0 0 18px rgba(0, 242, 254, 0.6);
            }
            50% {
                box-shadow: 0 0 32px rgba(0, 242, 254, 0.9);
            }
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1.5px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: rgba(0, 242, 254, 0.1);
            border-color: #fff;
            color: #fff;
        }
        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-mockup-wrapper {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 242, 254, 0.15);
            border: 2px solid rgba(0, 242, 254, 0.3);
            max-width: 340px;
            background: rgba(11, 14, 20, 0.7);
            backdrop-filter: blur(8px);
        }
        .hero-mockup-wrapper img {
            width: 100%;
            height: auto;
            display: block;
        }
        .hero-glow-ring {
            position: absolute;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            border: 1px solid rgba(0, 242, 254, 0.2);
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            pointer-events: none;
            animation: ringRotate 20s linear infinite;
        }
        @keyframes ringRotate {
            from {
                transform: translate(-50%, -50%) rotate(0deg);
            }
            to {
                transform: translate(-50%, -50%) rotate(360deg);
            }
        }

        /* ============ 通用区块 ============ */
        .section-padding {
            padding: 100px 0;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 36px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: center;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .section-title-underline {
            display: block;
            width: 60px;
            height: 3px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-teal));
            margin: 0 auto 48px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 48px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ 玻璃卡片 ============ */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--card-shadow);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .glass-card:hover {
            box-shadow: var(--card-shadow-hover);
            border-color: var(--card-border-hover);
            background: var(--bg-card-hover);
            transform: translateY(-4px);
        }
        .glass-card:hover::before {
            opacity: 1;
        }

        /* ============ 痛点区 ============ */
        .pain-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            max-width: 1000px;
            margin: 0 auto;
        }
        .pain-text-card {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 77, 109, 0.2);
            border-radius: var(--radius-lg);
            padding: 28px;
        }
        .pain-text-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
        }
        .pain-text-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .pain-icon-row {
            display: flex;
            gap: 16px;
            margin-top: 16px;
            flex-wrap: wrap;
        }
        .pain-icon-tag {
            background: rgba(255, 77, 109, 0.12);
            color: #FF6B81;
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid rgba(255, 77, 109, 0.3);
        }
        .pain-visual-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--card-shadow);
        }
        .pain-visual-card img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* ============ 解决方案卡片 ============ */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .solution-card {
            text-align: center;
            padding: 32px 20px;
        }
        .solution-icon-circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            background: rgba(0, 242, 254, 0.1);
            border: 1.5px solid rgba(0, 242, 254, 0.35);
            color: var(--accent-cyan);
            box-shadow: 0 0 22px rgba(0, 242, 254, 0.2);
            transition: all var(--transition-smooth);
        }
        .solution-card:hover .solution-icon-circle {
            box-shadow: 0 0 36px rgba(0, 242, 254, 0.45);
            border-color: var(--accent-cyan);
        }
        .solution-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }
        .solution-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.65;
        }

        /* ============ 数据区 ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            max-width: 1000px;
            margin: 0 auto;
            text-align: center;
        }
        .stat-item {
            padding: 24px;
        }
        .stat-number {
            font-family: var(--font-mono);
            font-size: 42px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
        }
        .stat-label {
            color: var(--text-secondary);
            font-size: 14px;
            margin-top: 6px;
        }

        /* ============ 证言区 ============ */
        .testimonials-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 16px;
            max-width: 1100px;
            margin: 0 auto;
            scrollbar-width: none;
        }
        .testimonials-scroll::-webkit-scrollbar {
            display: none;
        }
        .testimonial-card {
            flex: 0 0 340px;
            scroll-snap-align: start;
            padding: 28px 22px;
        }
        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid rgba(0, 242, 254, 0.4);
            flex-shrink: 0;
        }
        .testimonial-name {
            font-weight: 600;
            color: #fff;
            font-size: 15px;
        }
        .testimonial-stars {
            color: var(--gold);
            font-size: 13px;
            letter-spacing: 1px;
        }
        .testimonial-text {
            color: var(--text-secondary);
            font-style: italic;
            font-size: 14px;
            line-height: 1.65;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .faq-item[open] {
            border-color: rgba(0, 242, 254, 0.3);
            box-shadow: 0 4px 20px rgba(0, 242, 254, 0.1);
        }
        .faq-item summary {
            padding: 18px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: #fff;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            font-size: 14px;
            color: var(--accent-cyan);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 20px 18px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ============ CTA区 ============ */
        .cta-section-final {
            background: linear-gradient(180deg, #0B0E14 0%, #0a1a28 40%, #0B0E14 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
            padding: 100px 24px;
        }
        .cta-section-final::before {
            content: '';
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 242, 254, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-title {
            font-family: var(--font-heading);
            font-size: 38px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .cta-sub-text {
            color: var(--text-secondary);
            font-size: 14px;
            margin-top: 20px;
            position: relative;
            z-index: 1;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: #080a10;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 32px 24px;
            text-align: center;
        }
        .footer-logo-text {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-copy {
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.7;
        }
        .footer-nav-links {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 12px;
            list-style: none;
        }
        .footer-nav-links a {
            color: var(--text-secondary);
            font-size: 13px;
            transition: color var(--transition-smooth);
        }
        .footer-nav-links a:hover {
            color: var(--accent-cyan);
        }

        /* ============ 滚动动画 ============ */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease-out, transform 0.7s ease-out;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1023px) {
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 32px;
            }
            .hero-text h1 {
                font-size: 36px;
            }
            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-btns {
                justify-content: center;
            }
            .hero-visual {
                order: -1;
            }
            .hero-mockup-wrapper {
                max-width: 240px;
            }
            .hero-glow-ring {
                width: 260px;
                height: 260px;
            }
            .solutions-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .pain-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-title {
                font-size: 28px;
            }
            .cta-title {
                font-size: 28px;
            }
            .testimonial-card {
                flex: 0 0 280px;
            }
            .section-padding {
                padding: 60px 0;
            }
        }

        @media (max-width: 767px) {
            .nav-desktop {
                display: none;
            }
            .hamburger-btn {
                display: block;
            }
            .hero-text h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 13px 24px;
                font-size: 15px;
            }
            .solutions-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 32px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-title-underline {
                margin-bottom: 32px;
            }
            .cta-title {
                font-size: 24px;
            }
            .testimonial-card {
                flex: 0 0 260px;
            }
            .container-custom {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .section-padding {
                padding: 50px 0;
            }
            .faq-item summary {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 13px;
            }
        }

        @media (min-width: 768px) {
            .mobile-nav-overlay {
                display: none !important;
                opacity: 0 !important;
                pointer-events: none !important;
            }
        }