/* roulang page: index */
:root {
            --color-primary: #E53935;
            --color-primary-dark: #C62828;
            --color-primary-light: #FF5252;
            --color-accent: #FF6D00;
            --color-accent-glow: #FF9100;
            --color-bg-dark: #0D1117;
            --color-bg-card: #161B22;
            --color-bg-section: #111820;
            --color-bg-light: #1C2333;
            --color-text: #E6EDF3;
            --color-text-strong: #FFFFFF;
            --color-text-weak: #8B949E;
            --color-text-muted: #5C6570;
            --color-border: #21262D;
            --color-border-light: #30363D;
            --color-success: #2EA043;
            --color-warning: #D29922;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 24px rgba(229, 57, 53, 0.35);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            --font-condensed: 'Impact', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --nav-height: 68px;
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== HEADER / NAV ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .header.scrolled {
            background: rgba(13, 17, 23, 0.98);
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text-strong);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--color-primary);
            border-radius: var(--radius-md);
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }
        .logo-text span {
            color: var(--color-primary-light);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--color-text-strong);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-cta-btn {
            display: inline-block;
            padding: 10px 22px;
            background: var(--color-primary);
            color: #fff !important;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
            letter-spacing: 0.3px;
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 10px rgba(229, 57, 53, 0.35);
        }
        .nav-cta-btn:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            background: none;
            color: var(--color-text-strong);
            font-size: 1.5rem;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        @media (max-width: 900px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(13, 17, 23, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-smooth);
                box-shadow: var(--shadow-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                display: block;
                text-align: center;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-cta-btn {
                display: block;
                text-align: center;
                margin-top: 8px;
            }
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
        }

        /* ===== HERO ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: var(--nav-height);
            overflow: hidden;
            background: var(--color-bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }
        .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center 30%;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(180deg,
                    rgba(13, 17, 23, 0.55) 0%,
                    rgba(13, 17, 23, 0.7) 40%,
                    rgba(13, 17, 23, 0.88) 75%,
                    rgba(13, 17, 23, 0.96) 100%);
        }
        .hero-glow {
            position: absolute;
            top: 15%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(229, 57, 53, 0.25) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
            filter: blur(40px);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 750px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-block;
            padding: 5px 16px;
            background: rgba(229, 57, 53, 0.2);
            border: 1px solid rgba(229, 57, 53, 0.4);
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-primary-light);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 20px;
        }
        .hero-badge .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: #FF3D3D;
            border-radius: 50%;
            margin-right: 6px;
            animation: pulse-dot 1.4s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 61, 61, 0.8);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(255, 61, 61, 0);
            }
        }
        .hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 900;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }
        .hero h1 span {
            color: var(--color-primary-light);
            position: relative;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--color-text-weak);
            margin-bottom: 32px;
            line-height: 1.6;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.3px;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 18px rgba(229, 57, 53, 0.45);
        }
        .btn-primary:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: #fff;
        }
        .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, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            justify-content: center;
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-num {
            font-size: 1.6rem;
            font-weight: 900;
            color: #fff;
            font-family: var(--font-condensed);
            letter-spacing: 0.5px;
        }
        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--color-text-weak);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* ===== SECTIONS ===== */
        .section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .hero {
                min-height: 85vh;
            }
        }
        .section-dark {
            background: var(--color-bg-section);
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--color-primary-light);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.2rem);
            font-weight: 900;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-weak);
            max-width: 600px;
            margin: 0 auto 40px;
            line-height: 1.6;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header-left {
            text-align: left;
            margin-bottom: 40px;
        }

        /* ===== FEATURES CARDS ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .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: 32px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--color-primary);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .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 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            background: rgba(229, 57, 53, 0.12);
            border-radius: var(--radius-md);
            font-size: 1.5rem;
            color: var(--color-primary-light);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.5;
        }

        /* ===== MATCHES / COVER CARDS ===== */
        .matches-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        @media (max-width: 900px) {
            .matches-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .matches-grid {
                grid-template-columns: 1fr;
            }
        }
        .match-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .match-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .match-card-img {
            position: relative;
            width: 100%;
            padding-top: 56%;
            overflow: hidden;
            background: var(--color-bg-light);
        }
        .match-card-img img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .match-card:hover .match-card-img img {
            transform: scale(1.05);
        }
        .match-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-primary);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 999px;
            letter-spacing: 0.5px;
            z-index: 2;
        }
        .match-card-body {
            padding: 18px 16px;
        }
        .match-card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
            line-height: 1.3;
        }
        .match-card-meta {
            font-size: 0.8rem;
            color: var(--color-text-weak);
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .match-card-meta .score-tag {
            background: rgba(46, 160, 67, 0.2);
            color: var(--color-success);
            padding: 3px 10px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.75rem;
        }
        .match-card-meta .live-tag {
            background: rgba(229, 57, 53, 0.2);
            color: var(--color-primary-light);
            padding: 3px 10px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.75rem;
            animation: pulse-tag 2s infinite;
        }
        @keyframes pulse-tag {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }

        /* ===== STATS BAND ===== */
        .stats-band {
            position: relative;
            padding: 60px 0;
            background: var(--color-bg-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            overflow: hidden;
        }
        .stats-band-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            opacity: 0.08;
        }
        .stats-band-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .stats-band-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        @media (max-width: 768px) {
            .stats-band-inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 420px) {
            .stats-band-inner {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }
        .stat-block {
            padding: 16px;
        }
        .stat-block .stat-number {
            font-size: 2.4rem;
            font-weight: 900;
            color: #fff;
            font-family: var(--font-condensed);
            letter-spacing: 1px;
            line-height: 1;
        }
        .stat-block .stat-number .plus {
            color: var(--color-primary-light);
        }
        .stat-block .stat-desc {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            margin-top: 4px;
            letter-spacing: 0.5px;
        }

        /* ===== PROCESS / TIMELINE ===== */
        .process-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
            max-width: 700px;
            margin: 0 auto;
        }
        .process-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .process-item:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-sm);
        }
        .process-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            font-family: var(--font-condensed);
        }
        .process-content h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
        }
        .process-content p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.5;
        }
        .process-connector {
            display: none;
        }
        @media (min-width: 701px) {
            .process-list {
                position: relative;
            }
            .process-list::before {
                content: '';
                position: absolute;
                left: 41px;
                top: 50px;
                bottom: 50px;
                width: 2px;
                background: var(--color-border-light);
                z-index: 0;
            }
            .process-item {
                z-index: 1;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 750px;
            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:hover {
            border-color: var(--color-border-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            background: none;
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            text-align: left;
            gap: 12px;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question i {
            flex-shrink: 0;
            transition: transform var(--transition-smooth);
            color: var(--color-text-weak);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-primary-light);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background: var(--color-bg-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            overflow: hidden;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            opacity: 0.06;
        }
        .cta-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 900;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .cta-inner p {
            color: var(--color-text-weak);
            margin-bottom: 24px;
            font-size: 1rem;
            line-height: 1.6;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            max-width: 440px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border-radius: 999px;
            background: var(--color-bg-light);
            border: 1px solid var(--color-border-light);
            color: #fff;
            font-size: 0.95rem;
            transition: border-color var(--transition-fast);
        }
        .cta-form input::placeholder {
            color: var(--color-text-muted);
        }
        .cta-form input:focus {
            border-color: var(--color-primary-light);
        }
        .cta-form .btn {
            flex-shrink: 0;
        }

        /* ===== FOOTER ===== */
        .footer {
            background: var(--color-bg-dark);
            border-top: 1px solid var(--color-border);
            padding: 48px 0 28px;
            text-align: center;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            list-style: none;
            margin-bottom: 16px;
        }
        .footer-links a {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-primary-light);
        }
        .footer-copy {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* ===== UTILS ===== */
        .text-center {
            text-align: center;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        @media (max-width: 520px) {
            .hero-btns {
                flex-direction: column;
                align-items: center;
            }
            .hero-btns .btn {
                width: 100%;
                justify-content: center;
            }
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-form input {
                width: 100%;
            }
            .cta-form .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-stats-row {
                gap: 16px;
            }
            .hero-stat-num {
                font-size: 1.3rem;
            }
        }