/* roulang page: index */
:root {
            --primary-dark: #1E2A38;
            --primary-slate: #23282D;
            --deep-base: #11161B;
            --accent-gold: #E5A93C;
            --accent-orange: #E85D04;
            --bg-light: #F4F6F8;
            --bg-white: #FFFFFF;
            --text-main: #0F172A;
            --text-muted: #475569;
            --text-light: #E2E8F0;
            --border-color: #E2E8F0;
            --border-dark: #2A3644;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.06);
            --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
            --shadow-glow: 0 0 20px rgba(229, 169, 60, 0.25);
            --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset & Base */
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition-smooth); }
        a:hover { color: var(--accent-gold); }
        img { max-width: 100%; height: auto; display: block; }

        /* Document Header Layout */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #ffffff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.06);
        }
        .doc-topbar-meta {
            background: var(--deep-base);
            color: #94A3B8;
            font-size: 13px;
            padding: 6px 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: #10B981;
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px #10B981;
        }
        .main-navigation {
            padding: 12px 0;
            background: #ffffff;
        }
        .brand-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary-slate);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-logo i { color: var(--accent-gold); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-muted);
            padding: 6px 0;
            position: relative;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--accent-gold);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent-gold);
        }
        .header-search {
            position: relative;
        }
        .header-search input {
            background: #F1F5F9;
            border: 1px solid #CBD5E1;
            border-radius: 20px;
            font-size: 13px;
            padding: 6px 14px 6px 32px;
            margin: 0;
            height: auto;
            width: 170px;
            transition: var(--transition-smooth);
        }
        .header-search input:focus {
            background: #fff;
            border-color: var(--accent-gold);
            width: 210px;
            box-shadow: none;
        }
        .header-search i {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: #94A3B8;
            font-size: 12px;
        }
        .btn-launch {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
            color: #FFFFFF !important;
            font-weight: 700;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            box-shadow: 0 4px 12px rgba(232, 93, 4, 0.25);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-launch:hover {
            opacity: 0.95;
            transform: translateY(-1px);
        }

        /* Generic Section Framework */
        section {
            padding: 80px 0;
            position: relative;
        }
        .section-header {
            text-align: center;
            max-width: 820px;
            margin: 0 auto 50px;
        }
        .section-header .tagline {
            display: inline-block;
            background: rgba(229, 169, 60, 0.12);
            color: var(--accent-orange);
            font-weight: 700;
            font-size: 13px;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 1px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0;
        }
        .bg-dark-center {
            background: var(--deep-base);
            color: var(--text-light);
        }
        .bg-dark-center .section-header h2 {
            color: #FFFFFF;
        }
        .bg-dark-center .section-header p {
            color: #94A3B8;
        }
        .bg-slate {
            background: #EAEFF5;
        }

        /* Section 1: Hero Bento */
        .hero-bento-section {
            padding: 40px 0 70px;
            background: linear-gradient(180deg, #FFFFFF 0%, #F4F6F8 100%);
        }
        .bento-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }
        .bento-main {
            grid-row: span 2;
            background: var(--primary-slate);
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
            color: #FFFFFF;
            min-height: 480px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 40px;
            box-shadow: var(--shadow-card);
        }
        .bento-main-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.38;
            filter: contrast(110%);
        }
        .bento-main-content {
            position: relative;
            z-index: 2;
        }
        .bento-main-content h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #FFFFFF;
        }
        .bento-main-content p {
            font-size: 16px;
            color: #CBD5E1;
            margin-bottom: 24px;
            max-width: 620px;
        }
        .capsule-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .capsule {
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            color: #F8FAFC;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .btn-hero-primary {
            background: var(--accent-gold);
            color: var(--primary-slate);
            font-weight: 700;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-hero-primary:hover {
            background: #E8B958;
            transform: translateY(-2px);
            color: #000;
        }
        .btn-hero-secondary {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #FFFFFF;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
        }
        .btn-hero-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #FFFFFF;
        }
        .bento-sub-box {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 26px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
        }
        .bento-sub-box:hover {
            border-color: var(--accent-gold);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }
        .bento-sub-box .sub-badge {
            align-self: flex-start;
            background: #EFF6FF;
            color: #2563EB;
            font-size: 12px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 4px;
            margin-bottom: 12px;
        }
        .bento-sub-box h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary-slate);
        }
        .bento-sub-box p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .bento-stat-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent-orange);
            font-family: Consolas, monospace;
        }

        /* Section 2: Tech Architecture */
        .tech-arch-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px;
            box-shadow: var(--shadow-subtle);
        }
        .param-bar {
            background: #F8FAFC;
            border-left: 4px solid var(--accent-gold);
            padding: 14px 18px;
            margin-bottom: 14px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }
        .param-title {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-slate);
            display: flex;
            justify-content: space-between;
        }
        .param-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Section 3: Core Competencies */
        .comp-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .comp-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 30px;
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .comp-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-card);
        }
        .comp-icon {
            width: 52px;
            height: 52px;
            background: rgba(229, 169, 60, 0.12);
            color: var(--accent-gold);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            transition: var(--transition-smooth);
        }
        .comp-card:hover .comp-icon {
            background: var(--accent-gold);
            color: #FFFFFF;
            transform: rotate(-6deg);
        }
        .comp-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--primary-slate);
        }
        .comp-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Section 4: Hot Games Showcase */
        .games-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .game-item-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
        }
        .game-item-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
        }
        .game-thumb-wrapper {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .game-thumb-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .game-item-card:hover .game-thumb-wrapper img {
            transform: scale(1.05);
        }
        .game-tag-float {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(17, 22, 27, 0.85);
            color: #FFFFFF;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 700;
            backdrop-filter: blur(4px);
        }
        .game-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .game-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary-slate);
        }
        .game-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-grow: 1;
        }
        .game-meta-specs {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: #64748B;
            border-top: 1px solid #F1F5F9;
            padding-top: 14px;
            margin-bottom: 16px;
        }
        .btn-play-entry {
            display: block;
            text-align: center;
            background: var(--bg-light);
            border: 1px solid #CBD5E1;
            color: var(--primary-slate);
            font-weight: 700;
            font-size: 14px;
            padding: 10px;
            border-radius: var(--radius-sm);
        }
        .btn-play-entry:hover {
            background: var(--accent-gold);
            border-color: var(--accent-gold);
            color: var(--primary-slate);
        }

        /* Section 5: Engine Deep Dive */
        .pillar-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 30px;
            height: 100%;
        }
        .pillar-card h3 {
            font-size: 19px;
            color: var(--accent-gold);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .pillar-card p {
            color: #94A3B8;
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        /* Section 6: Tactical Scenarios */
        .story-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .story-box {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 36px;
            box-shadow: var(--shadow-subtle);
            display: flex;
            gap: 20px;
        }
        .story-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: #E2E8F0;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary-slate);
        }
        .story-info h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--primary-slate);
        }
        .story-info .role-tag {
            font-size: 13px;
            color: var(--accent-orange);
            font-weight: 600;
            margin-bottom: 12px;
            display: block;
        }
        .story-info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Section 7: Counters Strip */
        .stats-counter-strip {
            background: linear-gradient(135deg, #1E2A38 0%, #11161B 100%);
            padding: 50px 0;
            color: #FFFFFF;
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
        }
        .counter-cell {
            text-align: center;
            border-right: 1px solid rgba(255, 255, 255, 0.1);
        }
        .counter-cell:last-child {
            border-right: none;
        }
        .counter-cell .val {
            font-size: 38px;
            font-weight: 800;
            color: var(--accent-gold);
            font-family: Consolas, monospace;
            margin-bottom: 6px;
        }
        .counter-cell .label {
            font-size: 14px;
            color: #94A3B8;
            font-weight: 600;
        }

        /* Section 8: Social Proof Reviews */
        .review-box {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 28px;
            box-shadow: var(--shadow-subtle);
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .review-stars {
            color: var(--accent-gold);
            margin-bottom: 14px;
            font-size: 14px;
        }
        .review-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid #F1F5F9;
            padding-top: 14px;
        }
        .author-name {
            font-weight: 700;
            font-size: 14px;
            color: var(--primary-slate);
        }
        .author-rank {
            font-size: 12px;
            color: #64748B;
        }

        /* Section 9: Patch & News */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 24px;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-subtle);
        }
        .news-date {
            font-size: 12px;
            color: #94A3B8;
            margin-bottom: 8px;
            font-family: monospace;
        }
        .news-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary-slate);
            margin-bottom: 10px;
        }
        .news-card p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-grow: 1;
        }
        .news-more-btn {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-gold);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Section 10: FAQ Accordion */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 16px;
            color: var(--primary-slate);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 12px;
            color: #94A3B8;
            transition: transform 0.2s;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent-gold);
        }
        .faq-content {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            border-top: 1px solid #F8FAFC;
        }

        /* Section 11: Trust & Security */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .trust-badge-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            box-shadow: var(--shadow-subtle);
        }
        .trust-badge-card i {
            font-size: 32px;
            color: #2563EB;
            margin-bottom: 12px;
        }
        .trust-badge-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--primary-slate);
        }
        .trust-badge-card p {
            font-size: 12px;
            color: #64748B;
            margin: 0;
        }

        /* Section 12: Ultimate Action CTA */
        .ultimate-cta-section {
            background: radial-gradient(circle at 50% 50%, #23282D 0%, #11161B 100%);
            color: #FFFFFF;
            text-align: center;
            padding: 90px 0;
            border-top: 1px solid var(--border-dark);
        }
        .ultimate-cta-box {
            max-width: 760px;
            margin: 0 auto;
        }
        .ultimate-cta-box h2 {
            font-size: 36px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 18px;
        }
        .ultimate-cta-box p {
            font-size: 16px;
            color: #CBD5E1;
            margin-bottom: 32px;
        }
        .cta-btn-cluster {
            display: flex;
            justify-content: center;
            gap: 16px;
        }

        /* Sticky Action Strip */
        .sticky-action-strip {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(17, 22, 27, 0.94);
            backdrop-filter: blur(8px);
            border-top: 1px solid var(--border-dark);
            padding: 12px 0;
            z-index: 999;
            box-shadow: 0 -4px 16px rgba(0,0,0,0.2);
        }
        .sticky-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .sticky-info {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #FFFFFF;
        }
        .sticky-info .dot-live {
            width: 8px;
            height: 8px;
            background: var(--accent-gold);
            border-radius: 50%;
        }

        /* Site Footer */
        .site-footer {
            background: #0B0E11;
            color: #94A3B8;
            padding: 60px 0 90px;
            font-size: 13px;
            border-top: 1px solid #1E293B;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 18px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
            display: inline-block;
        }
        .footer-desc {
            font-size: 13px;
            color: #64748B;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #94A3B8;
        }
        .footer-links a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom-bar {
            border-top: 1px solid #1E293B;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #64748B;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .bento-grid {
                grid-template-columns: 1fr;
            }
            .bento-main {
                grid-row: auto;
                min-height: 400px;
            }
            .comp-grid, .games-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            .doc-topbar-meta {
                display: none;
            }
            .nav-links {
                display: none;
            }
            .story-container {
                grid-template-columns: 1fr;
            }
            .comp-grid, .games-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .stats-counter-strip .cell {
                margin-bottom: 20px;
            }
            .counter-cell {
                border-right: none;
                border-bottom: 1px solid rgba(255,255,255,0.1);
                padding-bottom: 14px;
            }
            .trust-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .sticky-action-strip {
                padding: 10px 0;
            }
        }