/* roulang page: index */
:root {
            --primary: #0A0E17;
            --accent: #00F0A8;
            --highlight: #FF3C5A;
            --card-bg: #131A26;
            --input-bg: #1A2233;
            --text-white: #FFFFFF;
            --text-body: #B0C0D0;
            --text-muted: #6B7B8D;
            --border-light: rgba(255, 255, 255, 0.06);
            --border-input: rgba(255, 255, 255, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 40px rgba(0, 240, 168, 0.12);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
            --font-mono: 'DIN Alternate', 'Roboto Mono', monospace;
            --font-en: 'Inter', 'SF Pro Display', sans-serif;
            --container-max: 1280px;
            --nav-height: 72px;
            --section-padding: 120px;
            --card-padding: 32px;
            --gap-col: 32px;
            --gap-row: 40px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--primary);
            color: var(--text-body);
            line-height: 1.7;
            font-weight: 400;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

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

        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navigation */
        #nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: var(--nav-height);
            background: transparent;
            transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            align-items: center;
        }

        #nav.scrolled {
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(16px);
            box-shadow: 0 1px 0 var(--border-light);
        }

        #nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            font-family: var(--font-en);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .nav-logo .dot {
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            gap: 48px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-body);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            padding-bottom: 6px;
            transition: color 0.25s ease;
        }

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

        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s ease;
        }

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

        .nav-cta {
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            transition: all 0.25s ease;
            white-space: nowrap;
            cursor: pointer;
            border: none;
        }

        .nav-cta:hover {
            background: #00D896;
            box-shadow: 0 0 24px rgba(0, 240, 168, 0.4);
            transform: scale(1.03);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            padding: 8px;
            z-index: 1100;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-white);
            border-radius: 2px;
            transition: all 0.3s ease;
            transform-origin: center;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: var(--primary);
            z-index: 1050;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            list-style: none;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            font-size: 22px;
            color: var(--text-white);
            font-weight: 600;
            transition: color 0.25s ease;
        }

        .mobile-menu a:hover {
            color: var(--accent);
        }

        .mobile-close {
            position: absolute;
            top: 24px;
            right: 24px;
            font-size: 32px;
            color: var(--text-white);
            cursor: pointer;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1101;
        }

        /* Hero Section */
        #hero {
            padding-top: calc(var(--nav-height) + 80px);
            padding-bottom: 80px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background-color: var(--primary);
            background-image: radial-gradient(circle at 80% 30%, rgba(0, 240, 168, 0.04) 0%, transparent 50%),
                url('/assets/images/backpic/back-1.webp');
            background-size: cover, cover;
            background-position: center, center;
            background-blend-mode: overlay, normal;
        }

        #hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            width: 100%;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-content h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.15;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-content .subtitle {
            font-size: 18px;
            color: var(--text-body);
            margin-bottom: 36px;
            line-height: 1.6;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            transition: all 0.25s ease;
            cursor: pointer;
            border: none;
            display: inline-block;
            text-align: center;
        }

        .btn-primary:hover {
            background: #00D896;
            box-shadow: 0 0 24px rgba(0, 240, 168, 0.4);
            transform: scale(1.03);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--accent);
            color: var(--accent);
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            transition: all 0.25s ease;
            cursor: pointer;
            display: inline-block;
            text-align: center;
        }

        .btn-outline:hover {
            background: rgba(0, 240, 168, 0.08);
            border-color: #00D896;
            color: #00D896;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat .stat-number {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.1;
        }

        .hero-stat .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
            font-weight: 500;
        }

        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .live-card {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 28px;
            width: 100%;
            max-width: 380px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            position: relative;
            z-index: 2;
        }

        .live-card .teams {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .live-card .team {
            text-align: center;
        }

        .live-card .team-name {
            color: var(--text-white);
            font-weight: 600;
            font-size: 18px;
        }

        .live-card .score {
            font-family: var(--font-mono);
            font-size: 48px;
            font-weight: 700;
            color: var(--text-white);
            animation: scorePulse 2s infinite;
        }

        @keyframes scorePulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        .live-card .vs {
            color: var(--text-muted);
            font-size: 18px;
            font-weight: 600;
            font-family: var(--font-en);
        }

        .live-badge {
            display: inline-block;
            background: var(--highlight);
            color: #fff;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .live-time {
            color: var(--text-muted);
            font-family: var(--font-mono);
            font-size: 14px;
        }

        .grid-lines {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            z-index: 1;
        }

        /* Section Common */
        section {
            padding-top: var(--section-padding);
            padding-bottom: var(--section-padding);
        }

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

        .section-header h2 {
            font-size: 36px;
            font-weight: 600;
            line-height: 1.25;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-body);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Solution Cards */
        #solution {
            background-color: var(--primary);
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-col);
        }

        .card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            box-shadow: var(--shadow-card);
            transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 15%;
            height: 40px;
            width: 3px;
            background: var(--accent);
            border-radius: 0 3px 3px 0;
            transition: height 0.3s ease, top 0.3s ease;
        }

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

        .card:hover::before {
            height: 60px;
            top: 10%;
        }

        .card-icon {
            width: 48px;
            height: 48px;
            margin-bottom: 20px;
            color: var(--accent);
        }

        .card h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .card p {
            font-size: 15px;
            color: var(--text-body);
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .card .btn-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            transition: color 0.25s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 0;
        }

        .card .btn-link:hover {
            color: #00D896;
            text-decoration: underline;
        }

        /* Results Section */
        #results {
            background-color: var(--card-bg);
        }

        .results-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-col);
            text-align: center;
        }

        .result-item .big-number {
            font-family: var(--font-mono);
            font-size: 56px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.1;
            animation: countUp 1.5s ease-out forwards;
        }

        .result-item .label {
            font-size: 16px;
            color: var(--text-body);
            margin-top: 8px;
        }

        .ticker-wrap {
            margin-top: 48px;
            background: rgba(255, 255, 255, 0.02);
            border-radius: 8px;
            padding: 16px 0;
            overflow: hidden;
            white-space: nowrap;
            border: 1px solid var(--border-light);
        }

        .ticker {
            display: inline-block;
            animation: tickerScroll 20s linear infinite;
            color: var(--text-body);
            font-family: var(--font-mono);
            font-size: 15px;
            letter-spacing: 0.5px;
        }

        @keyframes tickerScroll {
            0% {
                transform: translateX(100%);
            }
            100% {
                transform: translateX(-100%);
            }
        }

        /* Testimonials */
        #testimonials {
            background-color: var(--primary);
        }

        .testimonial-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            box-shadow: var(--shadow-card);
        }

        .testimonial-card .quote-icon {
            font-size: 48px;
            color: var(--accent);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 16px;
            font-family: serif;
        }

        .testimonial-card p {
            font-style: italic;
            color: var(--text-body);
            margin-bottom: 24px;
            font-size: 16px;
            line-height: 1.7;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--input-bg);
            border: 1px solid var(--border-light);
        }

        .author-info .name {
            color: var(--text-white);
            font-weight: 600;
            font-size: 15px;
        }

        .author-info .role {
            color: var(--text-muted);
            font-size: 13px;
        }

        /* FAQ */
        #faq {
            background-color: var(--primary);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1px;
            background: var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
        }

        .faq-item {
            background: var(--card-bg);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 24px 28px;
            font-size: 18px;
            font-weight: 500;
            color: var(--text-white);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border: none;
            background: transparent;
            transition: background 0.25s ease;
        }

        .faq-question:hover {
            background: var(--input-bg);
        }

        .faq-icon {
            font-size: 24px;
            transition: transform 0.4s ease;
            color: var(--accent);
            font-weight: 300;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            background: var(--primary);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 28px 24px;
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.7;
        }

        /* CTA Section */
        #cta {
            background: radial-gradient(circle at center, rgba(0, 240, 168, 0.08) 0%, var(--primary) 70%);
            text-align: center;
        }

        #cta h2 {
            font-size: 36px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        #cta .subtitle {
            color: var(--text-body);
            margin-bottom: 32px;
            font-size: 16px;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 500px;
            margin: 0 auto 16px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input {
            flex: 1;
            min-width: 240px;
            background: var(--input-bg);
            border: 1px solid var(--border-input);
            border-radius: var(--radius-btn);
            padding: 14px 20px;
            color: var(--text-white);
            font-size: 16px;
            transition: border-color 0.25s ease;
        }

        .cta-form input::placeholder {
            color: var(--text-muted);
        }

        .cta-form input:focus {
            border-color: var(--accent);
            outline: none;
        }

        .cta-form .btn-primary {
            white-space: nowrap;
        }

        .cta-note {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Footer */
        #contact {
            background: var(--primary);
            padding-top: 80px;
            padding-bottom: 40px;
            border-top: 1px solid var(--border-light);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-col .footer-logo {
            font-family: var(--font-en);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .footer-col .footer-logo .dot {
            color: var(--accent);
        }

        .footer-col p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-col h4 {
            color: var(--text-white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-col ul a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color 0.25s ease;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-bottom a {
            color: var(--text-muted);
            margin-left: 20px;
            transition: color 0.25s ease;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid,
            .results-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            #hero .container {
                gap: 40px;
            }
            .hero-content h1 {
                font-size: 40px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 80px;
                --card-padding: 24px;
            }
            .nav-links,
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            #hero .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-content h1 {
                font-size: 36px;
            }
            .live-card {
                margin: 0 auto;
            }
            .card-grid,
            .results-grid {
                grid-template-columns: 1fr;
            }
            .testimonial-card {
                text-align: center;
            }
            .testimonial-author {
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section-header h2,
            #cta h2 {
                font-size: 28px;
            }
            .big-number {
                font-size: 40px !important;
            }
            .cta-form {
                flex-direction: column;
                align-items: stretch;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-stats {
                flex-direction: column;
                align-items: center;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }