/* roulang page: index */
:root {
            --color-primary: #E53935;
            --color-primary-dark: #C62828;
            --color-primary-light: #FF5252;
            --color-accent: #FF6D00;
            --color-accent-gold: #FFB300;
            --color-bg-dark: #0B0F15;
            --color-bg-card: #141820;
            --color-bg-section: #0F1419;
            --color-bg-nav: rgba(11, 15, 21, 0.94);
            --color-text: #F1F3F5;
            --color-text-secondary: #B0B8C1;
            --color-text-weak: #6B7280;
            --color-border: #1E2530;
            --color-border-light: #2A3340;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 30px rgba(229, 57, 53, 0.25);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        }
        *,
        *::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(--color-bg-dark);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
            border: none;
            outline: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--color-bg-nav);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-base);
            height: 68px;
        }
        header.scrolled {
            box-shadow: var(--shadow-md);
            border-bottom-color: var(--color-border-light);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }
        .nav-logo:hover {
            opacity: 0.85;
        }
        .nav-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(229, 57, 53, 0.35);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.2px;
        }
        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.nav-cta {
            background: var(--color-primary);
            color: #fff;
            border-radius: 22px;
            padding: 9px 20px;
            font-weight: 600;
            box-shadow: 0 2px 12px rgba(229, 57, 53, 0.3);
            transition: all var(--transition-base);
        }
        .nav-links a.nav-cta:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 4px 18px rgba(229, 57, 53, 0.45);
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 2px;
            transition: all var(--transition-fast);
            transform-origin: center;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                flex-direction: column;
                justify-content: center;
                gap: 6px;
                background: var(--color-bg-card);
                border-left: 1px solid var(--color-border);
                padding: 80px 28px 40px;
                transition: right var(--transition-base);
                box-shadow: var(--shadow-lg);
                z-index: 999;
                align-items: stretch;
            }
            .nav-links.active {
                right: 0;
            }
            .nav-links a {
                padding: 14px 18px;
                border-radius: var(--radius-md);
                font-size: 1rem;
                text-align: center;
            }
            .nav-links a.nav-cta {
                margin-top: 10px;
                text-align: center;
                border-radius: var(--radius-md);
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.55);
                z-index: 998;
            }
            .mobile-overlay.active {
                display: block;
            }
        }
        @media (max-width: 520px) {
            .nav-links {
                width: 100%;
                right: -100%;
                border-left: none;
            }
            .nav-logo {
                font-size: 1.15rem;
            }
            .nav-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
        }
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            background-position: center 30%;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(11, 15, 21, 0.65) 0%,
                    rgba(11, 15, 21, 0.78) 40%,
                    rgba(11, 15, 21, 0.92) 80%,
                    var(--color-bg-dark) 100%);
            z-index: 1;
        }
        .hero-glow {
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(229, 57, 53, 0.18) 0%, transparent 70%);
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 0;
            pointer-events: none;
            animation: heroPulse 6s ease-in-out infinite;
        }
        @keyframes heroPulse {
            0%,
            100% {
                transform: translate(-50%, -50%) scale(1);
                opacity: 0.7;
            }
            50% {
                transform: translate(-50%, -50%) scale(1.2);
                opacity: 1;
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            padding: 120px 20px 80px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-accent-gold);
            letter-spacing: 0.3px;
            margin-bottom: 24px;
            animation: fadeInUp 0.7s ease-out;
        }
        .hero-badge .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #4CAF50;
            animation: livePulse 1.5s ease-in-out infinite;
            box-shadow: 0 0 8px rgba(76, 175, 80, 0.6);
        }
        @keyframes livePulse {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 4px rgba(76, 175, 80, 0.4);
            }
            50% {
                opacity: 0.4;
                box-shadow: 0 0 14px rgba(76, 175, 80, 0.9);
            }
        }
        .hero-title {
            font-family: var(--font-heading);
            font-size: clamp(2.4rem, 5.5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
            animation: fadeInUp 0.7s ease-out 0.1s both;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: clamp(1rem, 2.2vw, 1.2rem);
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            animation: fadeInUp 0.7s ease-out 0.2s both;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            animation: fadeInUp 0.7s ease-out 0.3s both;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.3px;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 18px rgba(229, 57, 53, 0.35);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 6px 24px rgba(229, 57, 53, 0.5);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(28px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--color-primary-light);
            margin-bottom: 10px;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: clamp(1.6rem, 3.5vw, 2.3rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .section-subtitle {
            color: var(--color-text-secondary);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            border-radius: 0 0 4px 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .feature-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(229, 57, 53, 0.15), rgba(255, 109, 0, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.4rem;
            color: var(--color-primary-light);
            transition: all var(--transition-base);
        }
        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .feature-card h3 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
        }
        .service-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .service-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 2px solid var(--color-border);
        }
        .service-card-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card-body h3 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.15rem;
            color: #fff;
            margin-bottom: 8px;
        }
        .service-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 14px;
        }
        .service-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 14px;
            border-radius: 16px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(229, 57, 53, 0.1);
            color: var(--color-primary-light);
            align-self: flex-start;
            letter-spacing: 0.3px;
        }
        .stats-section {
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            position: relative;
            padding: 80px 0;
        }
        .stats-overlay {
            position: absolute;
            inset: 0;
            background: rgba(11, 15, 21, 0.88);
            z-index: 1;
        }
        .stats-content {
            position: relative;
            z-index: 2;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }
        @media (max-width: 400px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        .stat-item .stat-number {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 800;
            color: #fff;
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-item .stat-number span {
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            letter-spacing: 0.3px;
        }
        .process-list {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
            counter-reset: process;
        }
        .process-item {
            flex: 1;
            min-width: 220px;
            max-width: 280px;
            text-align: center;
            position: relative;
            counter-increment: process;
            padding: 24px 18px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: all var(--transition-base);
        }
        .process-item:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .process-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: var(--shadow-glow);
        }
        .process-item h4 {
            font-family: var(--font-heading);
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
            font-size: 1.05rem;
        }
        .process-item p {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .process-list {
                flex-direction: column;
                align-items: center;
            }
            .process-item {
                max-width: 100%;
                width: 100%;
            }
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item.active {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            font-weight: 600;
            font-size: 0.98rem;
            color: #fff;
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
            line-height: 1.5;
        }
        .faq-question:hover {
            color: var(--color-primary-light);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition-fast);
            color: var(--color-text-secondary);
        }
        .faq-item.active .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 22px;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 260px;
            padding: 0 22px 20px;
        }
        .cta-section {
            background: var(--color-bg-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            text-align: center;
            padding: 70px 20px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(229, 57, 53, 0.08) 0%, transparent 70%);
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-family: var(--font-heading);
            font-size: clamp(1.5rem, 3.5vw, 2rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-content p {
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .footer {
            background: var(--color-bg-dark);
            border-top: 1px solid var(--color-border);
            padding: 40px 0;
            text-align: center;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            justify-content: center;
            margin-bottom: 18px;
            list-style: none;
        }
        .footer-links a {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            transition: color var(--transition-fast);
            padding: 4px 8px;
            border-radius: 4px;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-copy {
            font-size: 0.82rem;
            color: var(--color-text-weak);
            letter-spacing: 0.2px;
        }
        .footer-copy strong {
            color: var(--color-text-secondary);
            font-weight: 600;
        }
        .live-ticker {
            background: var(--color-bg-card);
            border-bottom: 1px solid var(--color-border);
            padding: 12px 0;
            overflow: hidden;
            white-space: nowrap;
            position: relative;
            z-index: 10;
            margin-top: 68px;
        }
        .live-ticker-inner {
            display: flex;
            gap: 40px;
            animation: tickerScroll 30s linear infinite;
            will-change: transform;
        }
        @keyframes tickerScroll {
            0% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(-50%);
            }
        }
        .ticker-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            flex-shrink: 0;
        }
        .ticker-item .ticker-score {
            font-weight: 700;
            color: #fff;
            background: var(--color-primary);
            padding: 3px 10px;
            border-radius: 10px;
            font-size: 0.8rem;
            letter-spacing: 0.5px;
        }
        .ticker-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #4CAF50;
            flex-shrink: 0;
            animation: livePulse 1.5s infinite;
        }
        .text-accent {
            color: var(--color-accent-gold);
        }
        .bg-card-alt {
            background: var(--color-bg-card);
        }
        .section-alt {
            background: var(--color-bg-section);
        }
        @media (max-width: 768px) {
            .hero-content {
                padding: 100px 16px 60px;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
            .service-card-img {
                height: 160px;
            }
            .stats-section {
                padding: 50px 0;
            }
        }