/* roulang page: index */
:root {
            --color-primary: #3b82f6;
            --color-primary-dark: #2563eb;
            --color-primary-light: #60a5fa;
            --color-accent: #10b981;
            --color-accent-dark: #059669;
            --color-bg: #f8fafc;
            --color-bg-alt: #f1f5f9;
            --color-surface: #ffffff;
            --color-dark: #0f172a;
            --color-dark-soft: #1e293b;
            --color-text: #1e293b;
            --color-text-soft: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(15,23,42,0.06);
            --shadow-md: 0 4px 16px rgba(15,23,42,0.08);
            --shadow-lg: 0 12px 40px rgba(15,23,42,0.12);
            --shadow-xl: 0 20px 60px rgba(15,23,42,0.16);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-heading: 'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;
            --font-body: 'PingFang SC','Microsoft YaHei','Segoe UI',sans-serif;
            --max-width: 1240px;
            --nav-height: 72px;
        }

        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
        body{font-family:var(--font-body);font-size:16px;line-height:1.7;color:var(--color-text);background:var(--color-bg);overflow-x:hidden;-webkit-tap-highlight-color:transparent}
        img{max-width:100%;height:auto;display:block}
        a{text-decoration:none;color:inherit;transition:color var(--transition-fast)}
        button,input,select,textarea{font-family:inherit;font-size:inherit}
        ul,ol{list-style:none;padding:0;margin:0}
        h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.3;color:var(--color-dark)}
        h1{font-size:clamp(2.2rem,4.5vw,3.6rem);letter-spacing:-0.02em}
        h2{font-size:clamp(1.8rem,3.2vw,2.6rem);letter-spacing:-0.01em}
        h3{font-size:clamp(1.3rem,2vw,1.7rem)}
        h4{font-size:1.15rem}
        :focus-visible{outline:2px solid var(--color-primary);outline-offset:3px;border-radius:4px}

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

        /* ===== Header & Glass Nav ===== */
        .site-header{position:fixed;top:0;left:0;right:0;z-index:1050;height:var(--nav-height);transition:all var(--transition-base)}
        .site-header .navbar{height:var(--nav-height);padding:0;background:rgba(15,23,42,0.72);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,0.08);transition:all var(--transition-base);border-radius:0}
        .site-header.scrolled .navbar{background:rgba(15,23,42,0.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,0.12);box-shadow:0 4px 24px rgba(0,0,0,0.25)}
        .site-header .container{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:var(--max-width)}
        .nav-logo{font-family:var(--font-heading);font-size:1.45rem;font-weight:700;color:#ffffff !important;letter-spacing:-0.01em;white-space:nowrap;display:flex;align-items:center;gap:8px;transition:opacity var(--transition-fast)}
        .nav-logo:hover{opacity:0.85;color:#ffffff !important}
        .nav-logo .logo-dot{width:10px;height:10px;border-radius:50%;background:var(--color-accent);display:inline-block;box-shadow:0 0 12px rgba(16,185,129,0.6)}
        .nav-links-desktop{display:flex;align-items:center;gap:6px}
        .nav-links-desktop .nav-link-item{color:rgba(255,255,255,0.82);font-size:0.95rem;font-weight:500;padding:8px 18px;border-radius:var(--radius-sm);transition:all var(--transition-fast);white-space:nowrap;letter-spacing:0.01em}
        .nav-links-desktop .nav-link-item:hover{color:#ffffff;background:rgba(255,255,255,0.1)}
        .nav-links-desktop .nav-link-item.active{color:#ffffff;background:rgba(59,130,246,0.35);font-weight:600}
        .nav-cta-btn{display:inline-flex;align-items:center;gap:6px;padding:9px 22px;background:var(--color-primary);color:#fff;border-radius:var(--radius-sm);font-weight:600;font-size:0.92rem;border:none;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;letter-spacing:0.01em;box-shadow:0 2px 12px rgba(59,130,246,0.35)}
        .nav-cta-btn:hover{background:var(--color-primary-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(59,130,246,0.45);color:#fff}
        .navbar-toggler{border:none;padding:8px;color:#ffffff;background:rgba(255,255,255,0.1);border-radius:var(--radius-sm);transition:all var(--transition-fast)}
        .navbar-toggler:hover{background:rgba(255,255,255,0.2)}
        .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(59,130,246,0.4);outline:none}
        .mobile-menu{background:rgba(15,23,42,0.97);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:0 0 var(--radius-lg) var(--radius-lg);padding:16px;border:1px solid rgba(255,255,255,0.08);border-top:none}
        .mobile-menu .nav-link-item{display:block;color:rgba(255,255,255,0.85);font-size:1rem;font-weight:500;padding:12px 18px;border-radius:var(--radius-sm);transition:all var(--transition-fast);margin-bottom:4px}
        .mobile-menu .nav-link-item:hover{color:#ffffff;background:rgba(255,255,255,0.08)}
        .mobile-menu .nav-link-item.active{color:#ffffff;background:rgba(59,130,246,0.3);font-weight:600}
        .mobile-menu .nav-cta-btn{width:100%;justify-content:center;margin-top:8px;padding:12px 22px;font-size:1rem}
        @media(min-width:992px){.navbar-toggler,.mobile-menu{display:none!important}}
        @media(max-width:991px){.nav-links-desktop{display:none!important}}

        /* ===== Hero ===== */
        .hero-section{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;padding-top:var(--nav-height);background:var(--color-dark)}
        .hero-bg{position:absolute;inset:0;z-index:0}
        .hero-bg img,.hero-bg picture{width:100%;height:100%;object-fit:cover;object-position:center}
        .hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,0.55) 0%,rgba(15,23,42,0.7) 40%,rgba(15,23,42,0.85) 100%)}
        .hero-overlay-particles{position:absolute;inset:0;z-index:1;pointer-events:none;background:radial-gradient(ellipse at 30% 35%,rgba(59,130,246,0.12) 0%,transparent 55%),radial-gradient(ellipse at 65% 55%,rgba(16,185,129,0.08) 0%,transparent 50%),radial-gradient(ellipse at 50% 70%,rgba(59,130,246,0.05) 0%,transparent 60%)}
        .hero-content{position:relative;z-index:2;text-align:center;max-width:820px;padding:40px 24px}
        .hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 20px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.16);border-radius:50px;color:rgba(255,255,255,0.9);font-size:0.88rem;font-weight:500;margin-bottom:28px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);letter-spacing:0.02em}
        .hero-badge .badge-dot{width:8px;height:8px;border-radius:50%;background:var(--color-accent);animation:pulse-dot 2.2s ease-in-out infinite;box-shadow:0 0 10px rgba(16,185,129,0.7)}
        @keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.5;transform:scale(1.6)}}
        .hero-content h1{color:#ffffff;font-weight:800;margin-bottom:20px;text-shadow:0 2px 20px rgba(0,0,0,0.3)}
        .hero-content h1 .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-content .hero-desc{font-size:1.2rem;color:rgba(255,255,255,0.72);max-width:600px;margin:0 auto 36px;line-height:1.8;font-weight:400}
        .hero-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
        .btn-hero-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:var(--color-primary);color:#fff;border-radius:50px;font-weight:600;font-size:1.02rem;border:none;cursor:pointer;transition:all var(--transition-base);box-shadow:0 8px 28px rgba(59,130,246,0.4);letter-spacing:0.02em}
        .btn-hero-primary:hover{background:var(--color-primary-dark);transform:translateY(-3px);box-shadow:0 16px 40px rgba(59,130,246,0.5);color:#fff}
        .btn-hero-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:rgba(255,255,255,0.06);color:#ffffff;border:1.5px solid rgba(255,255,255,0.3);border-radius:50px;font-weight:600;font-size:1.02rem;cursor:pointer;transition:all var(--transition-base);letter-spacing:0.02em;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
        .btn-hero-outline:hover{background:rgba(255,255,255,0.14);border-color:rgba(255,255,255,0.55);color:#fff;transform:translateY(-3px)}
        .hero-scroll-indicator{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);z-index:3;display:flex;flex-direction:column;align-items:center;gap:6px;color:rgba(255,255,255,0.5);font-size:0.8rem;animation:float-down 2.5s ease-in-out infinite;cursor:pointer}
        @keyframes float-down{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(10px)}}
        .hero-scroll-indicator .scroll-line{width:1.5px;height:28px;background:rgba(255,255,255,0.3);border-radius:2px}
        @media(max-width:768px){.hero-content h1{font-size:2rem}.hero-content .hero-desc{font-size:1.02rem}.btn-hero-primary,.btn-hero-outline{padding:12px 26px;font-size:0.95rem}}

        /* ===== Sections ===== */
        .section{padding:88px 0}
        .section-alt{background:var(--color-bg-alt)}
        .section-dark{background:var(--color-dark);color:#ffffff}
        .section-header{text-align:center;margin-bottom:56px}
        .section-header .section-tag{display:inline-block;font-size:0.85rem;font-weight:600;color:var(--color-primary);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:12px;background:rgba(59,130,246,0.08);padding:4px 14px;border-radius:50px}
        .section-header h2{margin-bottom:14px}
        .section-header .section-subtitle{color:var(--color-text-soft);font-size:1.08rem;max-width:580px;margin:0 auto;line-height:1.7}
        .section-dark .section-subtitle{color:rgba(255,255,255,0.6)}
        .section-dark .section-tag{background:rgba(59,130,246,0.2);color:var(--color-primary-light)}
        @media(max-width:768px){.section{padding:56px 0}.section-header{margin-bottom:36px}}

        /* ===== Feature Cards ===== */
        .feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
        .feature-card{background:var(--color-surface);border-radius:var(--radius-lg);padding:32px 28px;border:1px solid var(--color-border);transition:all var(--transition-base);position:relative;overflow:hidden}
        .feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));opacity:0;transition:opacity var(--transition-base);border-radius:var(--radius-lg) var(--radius-lg) 0 0}
        .feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
        .feature-card:hover::before{opacity:1}
        .feature-icon{width:52px;height:52px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:18px;background:rgba(59,130,246,0.08);color:var(--color-primary);transition:all var(--transition-base)}
        .feature-card:hover .feature-icon{background:var(--color-primary);color:#fff;transform:scale(1.06)}
        .feature-card h3{font-size:1.2rem;margin-bottom:10px}
        .feature-card p{color:var(--color-text-soft);font-size:0.95rem;line-height:1.7;margin:0}

        /* ===== Stats / Metrics ===== */
        .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
        .stat-card{text-align:center;padding:32px 20px;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-lg);transition:all var(--transition-base)}
        .stat-card:hover{background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.2);transform:translateY(-4px)}
        .stat-value{font-family:var(--font-heading);font-size:2.8rem;font-weight:800;background:linear-gradient(135deg,var(--color-primary-light),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.1;margin-bottom:6px}
        .stat-label{font-size:0.92rem;color:rgba(255,255,255,0.6);font-weight:500;letter-spacing:0.02em}
        .stat-unit{font-size:1.1rem;font-weight:600;color:rgba(255,255,255,0.5)}
        @media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:14px}.stat-value{font-size:2.2rem}}

        /* ===== Category Entry Cards ===== */
        .category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
        .category-card{position:relative;border-radius:var(--radius-lg);overflow:hidden;height:280px;cursor:pointer;transition:all var(--transition-base);border:1px solid var(--color-border)}
        .category-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl)}
        .category-card img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}
        .category-card:hover img{transform:scale(1.08)}
        .category-card-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,0.1) 0%,rgba(15,23,42,0.75) 70%,rgba(15,23,42,0.9) 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:28px;transition:all var(--transition-base)}
        .category-card:hover .category-card-overlay{background:linear-gradient(180deg,rgba(15,23,42,0.05) 0%,rgba(15,23,42,0.8) 65%,rgba(15,23,42,0.92) 100%)}
        .category-card-overlay h3{color:#ffffff;font-size:1.4rem;margin-bottom:6px;font-weight:700}
        .category-card-overlay p{color:rgba(255,255,255,0.7);font-size:0.9rem;margin:0;line-height:1.5}
        .category-card-arrow{position:absolute;right:24px;bottom:24px;width:40px;height:40px;border-radius:50%;background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:all var(--transition-base);opacity:0;transform:translateX(-8px)}
        .category-card:hover .category-card-arrow{opacity:1;transform:translateX(0)}
        @media(max-width:768px){.category-grid{grid-template-columns:1fr}.category-card{height:220px}}

        /* ===== News List ===== */
        .news-list{display:flex;flex-direction:column;gap:0}
        .news-item{display:flex;align-items:flex-start;gap:20px;padding:20px 0;border-bottom:1px solid var(--color-border);transition:all var(--transition-fast)}
        .news-item:last-child{border-bottom:none}
        .news-item:hover{padding-left:8px}
        .news-item-thumb{flex-shrink:0;width:100px;height:70px;border-radius:var(--radius-sm);overflow:hidden;background:var(--color-bg-alt)}
        .news-item-thumb img{width:100%;height:100%;object-fit:cover}
        .news-item-body{flex:1;min-width:0}
        .news-item-body h4{font-size:1.05rem;font-weight:600;margin-bottom:6px;line-height:1.5;transition:color var(--transition-fast)}
        .news-item-body h4 a{color:var(--color-dark)}
        .news-item-body h4 a:hover{color:var(--color-primary)}
        .news-item-body p{color:var(--color-text-soft);font-size:0.88rem;margin:0 0 6px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .news-item-meta{font-size:0.8rem;color:var(--color-text-light);display:flex;gap:12px;align-items:center}
        .news-item-meta .meta-tag{display:inline-block;padding:2px 10px;background:rgba(59,130,246,0.08);color:var(--color-primary);border-radius:50px;font-weight:500;font-size:0.75rem}
        .news-empty{text-align:center;padding:48px 20px;color:var(--color-text-soft);font-size:1.05rem}
        @media(max-width:768px){.news-item{flex-direction:column;gap:14px}.news-item-thumb{width:100%;height:160px}.news-item:hover{padding-left:0}}

        /* ===== FAQ Accordion ===== */
        .faq-accordion .accordion-item{border:1px solid var(--color-border);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden;background:var(--color-surface);transition:all var(--transition-fast)}
        .faq-accordion .accordion-item:hover{border-color:var(--color-primary-light);box-shadow:var(--shadow-sm)}
        .faq-accordion .accordion-button{font-weight:600;font-size:1.02rem;color:var(--color-dark);padding:20px 24px;background:transparent;box-shadow:none;transition:all var(--transition-fast);border-radius:0}
        .faq-accordion .accordion-button:not(.collapsed){color:var(--color-primary);background:rgba(59,130,246,0.03);box-shadow:none}
        .faq-accordion .accordion-button:focus{box-shadow:none;border-color:transparent}
        .faq-accordion .accordion-body{color:var(--color-text-soft);padding:4px 24px 20px;font-size:0.95rem;line-height:1.8}
        .faq-accordion .accordion-button::after{transition:all var(--transition-fast)}

        /* ===== CTA Section ===== */
        .cta-section{position:relative;overflow:hidden;border-radius:var(--radius-xl);padding:60px 40px;text-align:center}
        .cta-bg{position:absolute;inset:0;z-index:0}
        .cta-bg img{width:100%;height:100%;object-fit:cover}
        .cta-bg::after{content:'';position:absolute;inset:0;background:rgba(15,23,42,0.82)}
        .cta-content{position:relative;z-index:1;max-width:600px;margin:0 auto}
        .cta-content h2{color:#ffffff;margin-bottom:14px}
        .cta-content p{color:rgba(255,255,255,0.7);font-size:1.05rem;margin-bottom:28px;line-height:1.7}
        .btn-cta-lg{display:inline-flex;align-items:center;gap:10px;padding:16px 38px;background:var(--color-accent);color:#fff;border-radius:50px;font-weight:700;font-size:1.06rem;border:none;cursor:pointer;transition:all var(--transition-base);box-shadow:0 8px 30px rgba(16,185,129,0.4);letter-spacing:0.02em}
        .btn-cta-lg:hover{background:var(--color-accent-dark);transform:translateY(-3px);box-shadow:0 16px 44px rgba(16,185,129,0.5);color:#fff}
        @media(max-width:768px){.cta-section{padding:40px 20px;border-radius:var(--radius-lg)}}

        /* ===== Footer ===== */
        .site-footer{background:var(--color-dark-soft);color:rgba(255,255,255,0.7);padding:48px 0 28px;border-top:1px solid rgba(255,255,255,0.06)}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:36px}
        .footer-brand .footer-logo{font-family:var(--font-heading);font-size:1.3rem;font-weight:700;color:#ffffff;margin-bottom:12px;display:block}
        .footer-brand p{font-size:0.9rem;color:rgba(255,255,255,0.5);line-height:1.7;margin:0}
        .footer-col h4{font-size:0.95rem;color:#ffffff;font-weight:600;margin-bottom:16px;letter-spacing:0.02em}
        .footer-col ul li{margin-bottom:10px}
        .footer-col ul li a{color:rgba(255,255,255,0.55);font-size:0.9rem;transition:color var(--transition-fast)}
        .footer-col ul li a:hover{color:#ffffff}
        .footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;font-size:0.85rem;color:rgba(255,255,255,0.4)}
        .footer-bottom a{color:rgba(255,255,255,0.5)}
        .footer-bottom a:hover{color:#ffffff}
        @media(max-width:768px){.footer-grid{grid-template-columns:1fr;gap:28px}}

        /* ===== Platform List (Category Page Shared) ===== */
        .platform-list-item{display:flex;gap:20px;padding:20px;background:var(--color-surface);border-radius:var(--radius-md);border:1px solid var(--color-border);transition:all var(--transition-fast);margin-bottom:14px}
        .platform-list-item:hover{box-shadow:var(--shadow-md);border-color:transparent;transform:translateY(-2px)}
        .platform-list-item .pli-img{width:140px;height:100px;border-radius:var(--radius-sm);overflow:hidden;flex-shrink:0}
        .platform-list-item .pli-img img{width:100%;height:100%;object-fit:cover}
        .platform-list-item .pli-body h4{font-size:1.1rem;margin-bottom:6px}
        .platform-list-item .pli-body p{color:var(--color-text-soft);font-size:0.9rem;margin:0;line-height:1.6}
        @media(max-width:768px){.platform-list-item{flex-direction:column}.platform-list-item .pli-img{width:100%;height:160px}}

        /* ===== Utility ===== */
        .text-gradient{background:linear-gradient(135deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
        .fw-800{font-weight:800}
        .gap-14{gap:14px}

/* roulang page: article */
:root {
            --primary: #0ea5e9;
            --primary-dark: #0284c7;
            --primary-light: #38bdf8;
            --accent: #f59e0b;
            --accent-glow: #fbbf24;
            --bg-dark: #0b1121;
            --bg-deeper: #060b18;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --bg-surface: #162032;
            --text-main: #e2e8f0;
            --text-strong: #f1f5f9;
            --text-weak: #94a3b8;
            --text-muted: #64748b;
            --border-subtle: rgba(148, 163, 184, 0.15);
            --border-card: rgba(148, 163, 184, 0.12);
            --border-glow: rgba(14, 165, 233, 0.35);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.2);
            --shadow-accent: 0 0 30px rgba(245, 158, 11, 0.18);
            --glass-bg: rgba(11, 17, 33, 0.65);
            --glass-border: rgba(148, 163, 184, 0.18);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--primary-light);
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        :focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: all var(--transition-smooth);
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
        }

        .site-header.scrolled {
            background: rgba(6, 11, 24, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-subtle);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.45);
        }

        .site-header .navbar {
            padding: 14px 0;
            flex-wrap: nowrap;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-strong) !important;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-logo:hover {
            color: var(--primary-light) !important;
        }

        .logo-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 16px rgba(14, 165, 233, 0.7), 0 0 32px rgba(14, 165, 233, 0.35);
            flex-shrink: 0;
            animation: logoPulse 2.5s ease-in-out infinite;
        }

        @keyframes logoPulse {
            0%,
            100% {
                box-shadow: 0 0 16px rgba(14, 165, 233, 0.7), 0 0 32px rgba(14, 165, 233, 0.35);
            }
            50% {
                box-shadow: 0 0 24px rgba(14, 165, 233, 0.9), 0 0 48px rgba(14, 165, 233, 0.5);
            }
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }

        .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-weak);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link-item:hover {
            color: var(--text-strong);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-link-item.active {
            color: var(--primary-light);
            background: rgba(14, 165, 233, 0.1);
            font-weight: 600;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            color: #fff !important;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 18px rgba(14, 165, 233, 0.35);
            transition: all var(--transition-fast);
            white-space: nowrap;
            margin-left: 8px;
        }

        .nav-cta-btn:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            box-shadow: 0 6px 28px rgba(14, 165, 233, 0.5);
            transform: translateY(-1px);
            color: #fff !important;
        }

        .navbar-toggler {
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            color: var(--text-weak);
            background: transparent;
            transition: all var(--transition-fast);
            display: none;
        }

        .navbar-toggler:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-strong);
        }

        .mobile-menu {
            background: rgba(11, 17, 33, 0.97);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-top: 1px solid var(--border-subtle);
            padding: 16px 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-menu .nav-link-item {
            padding: 12px 16px;
            font-size: 1rem;
        }

        .mobile-menu .nav-cta-btn {
            margin-left: 0;
            justify-content: center;
            margin-top: 6px;
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 130px 0 70px;
            background: linear-gradient(180deg, rgba(11, 17, 33, 0.2) 0%, var(--bg-dark) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            background-blend-mode: overlay;
            text-align: center;
            border-bottom: 1px solid var(--border-subtle);
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 30%, rgba(14, 165, 233, 0.12) 0%, transparent 65%);
            pointer-events: none;
        }

        .article-banner .banner-category {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--primary-light);
            background: rgba(14, 165, 233, 0.12);
            border: 1px solid rgba(14, 165, 233, 0.25);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--text-strong);
            margin: 0 auto 16px;
            max-width: 800px;
            line-height: 1.35;
            letter-spacing: 0.01em;
        }

        .article-banner .banner-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            color: var(--text-weak);
            font-size: 0.9rem;
        }

        .article-banner .banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-banner .banner-meta i {
            color: var(--primary);
            font-size: 0.85em;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            background: var(--bg-deeper);
            border-bottom: 1px solid var(--border-subtle);
            padding: 14px 0;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.88rem;
            color: var(--text-weak);
            margin: 0;
            list-style: none;
            padding: 0;
        }

        .breadcrumb-custom a {
            color: var(--text-weak);
            transition: color var(--transition-fast);
        }

        .breadcrumb-custom a:hover {
            color: var(--primary-light);
        }

        .breadcrumb-custom .sep {
            color: var(--text-muted);
            font-size: 0.7em;
        }

        .breadcrumb-custom .current {
            color: var(--text-strong);
            font-weight: 500;
        }

        /* ===== 文章主体 ===== */
        .article-main-section {
            padding: 50px 0 60px;
            background: var(--bg-dark);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
            align-items: start;
        }

        .article-content-area {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-card);
            padding: 40px;
            box-shadow: var(--shadow-md);
        }

        .article-content-area .article-cover-img {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-subtle);
        }

        .article-content-area .article-body {
            font-size: 1.03rem;
            line-height: 1.85;
            color: var(--text-main);
        }

        .article-content-area .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-strong);
            margin: 36px 0 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-subtle);
        }

        .article-content-area .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-strong);
            margin: 28px 0 10px;
        }

        .article-content-area .article-body p {
            margin-bottom: 16px;
        }

        .article-content-area .article-body ul,
        .article-content-area .article-body ol {
            padding-left: 24px;
            margin-bottom: 16px;
        }

        .article-content-area .article-body li {
            margin-bottom: 8px;
        }

        .article-content-area .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(14, 165, 233, 0.06);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
            color: var(--text-weak);
            font-style: italic;
        }

        .article-content-area .article-body code {
            background: rgba(14, 165, 233, 0.1);
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-light);
        }

        .article-content-area .article-body pre {
            background: var(--bg-deeper);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 20px;
            overflow-x: auto;
            margin: 20px 0;
        }

        .article-content-area .article-body pre code {
            background: none;
            padding: 0;
            color: var(--text-main);
        }

        .article-tags-row {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
        }

        .article-tags-row .tag-label {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-weak);
        }

        .article-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(14, 165, 233, 0.08);
            color: var(--primary-light);
            border: 1px solid rgba(14, 165, 233, 0.2);
            transition: all var(--transition-fast);
        }

        .article-tag:hover {
            background: rgba(14, 165, 233, 0.18);
            border-color: rgba(14, 165, 233, 0.4);
            color: var(--primary-light);
        }

        .article-share-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .article-share-row .share-label {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-weak);
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: 1px solid var(--border-subtle);
            color: var(--text-weak);
            transition: all var(--transition-fast);
            font-size: 0.95rem;
        }

        .share-btn:hover {
            color: #fff;
            border-color: var(--primary);
            background: var(--primary);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-card);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            color: var(--primary);
            font-size: 0.85em;
        }

        .sidebar-post-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
            align-items: flex-start;
        }

        .sidebar-post-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-post-item:hover {
            padding-left: 6px;
        }

        .sidebar-post-item .sp-thumb {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            border: 1px solid var(--border-subtle);
        }

        .sidebar-post-item .sp-info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-post-item .sp-title {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .sidebar-post-item:hover .sp-title {
            color: var(--primary-light);
        }

        .sidebar-post-item .sp-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .sidebar-tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-tag {
            display: inline-block;
            padding: 5px 13px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(14, 165, 233, 0.06);
            color: var(--text-weak);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

        .sidebar-tag:hover {
            background: rgba(14, 165, 233, 0.15);
            border-color: rgba(14, 165, 233, 0.35);
            color: var(--primary-light);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 50px 0 60px;
            background: var(--bg-deeper);
            border-top: 1px solid var(--border-subtle);
        }

        .related-section .section-heading {
            text-align: center;
            margin-bottom: 36px;
        }

        .related-section .section-heading h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 8px;
        }

        .related-section .section-heading p {
            color: var(--text-weak);
            font-size: 0.95rem;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-sm);
        }

        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border-glow);
        }

        .related-card .rc-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

        .related-card .rc-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .related-card:hover .rc-img-wrap img {
            transform: scale(1.06);
        }

        .related-card .rc-body {
            padding: 16px 18px;
        }

        .related-card .rc-body h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }

        .related-card:hover .rc-body h4 {
            color: var(--primary-light);
        }

        .related-card .rc-body .rc-date {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 55px 0 60px;
            background: var(--bg-dark);
        }

        .faq-section .section-heading {
            text-align: center;
            margin-bottom: 36px;
        }

        .faq-section .section-heading h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 8px;
        }

        .faq-section .section-heading p {
            color: var(--text-weak);
            font-size: 0.95rem;
        }

        .faq-accordion .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-strong);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 22px;
            box-shadow: none;
            transition: all var(--transition-fast);
            border-radius: var(--radius-md) !important;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(14, 165, 233, 0.06);
            color: var(--primary-light);
            box-shadow: none;
            border-bottom: 1px solid var(--border-subtle);
        }

        .faq-accordion .accordion-button::after {
            filter: brightness(0) invert(0.7);
        }

        .faq-accordion .accordion-body {
            padding: 18px 22px;
            color: var(--text-weak);
            line-height: 1.75;
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(180deg, var(--bg-deeper) 0%, var(--bg-dark) 100%);
            text-align: center;
            border-top: 1px solid var(--border-subtle);
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 12px;
        }

        .cta-section p {
            color: var(--text-weak);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 6px 28px rgba(14, 165, 233, 0.4);
            border: none;
            transition: all var(--transition-fast);
        }

        .btn-cta-primary:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            box-shadow: 0 10px 36px rgba(14, 165, 233, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-strong);
            background: transparent;
            border: 2px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

        .btn-cta-outline:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(14, 165, 233, 0.05);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deeper);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 30px;
            color: var(--text-weak);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-strong);
            display: block;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: var(--text-muted);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--primary-light);
        }

        .footer-col ul li a i {
            width: 18px;
            text-align: center;
            margin-right: 4px;
            color: var(--text-weak);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ===== 404状态 ===== */
        .not-found-area {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-md);
        }

        .not-found-area .nf-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .not-found-area h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 10px;
        }

        .not-found-area p {
            color: var(--text-weak);
            margin-bottom: 24px;
            font-size: 1rem;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            color: #fff;
            background: var(--primary);
            border: none;
            transition: all var(--transition-fast);
        }

        .btn-back-home:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow-glow);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr 280px;
                gap: 28px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-banner h1 {
                font-size: 1.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav-links-desktop {
                display: none;
            }
            .navbar-toggler {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .article-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .article-sidebar {
                position: static;
                top: auto;
            }
            .article-content-area {
                padding: 24px 18px;
            }
            .article-banner {
                padding: 110px 0 45px;
            }
            .article-banner h1 {
                font-size: 1.5rem;
                max-width: 100%;
            }
            .article-banner .banner-meta {
                gap: 14px;
                font-size: 0.8rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .related-section .section-heading h2 {
                font-size: 1.4rem;
            }
            .faq-section .section-heading h2 {
                font-size: 1.4rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .breadcrumb-custom {
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.25rem;
            }
            .article-content-area {
                padding: 18px 14px;
                border-radius: var(--radius-md);
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-cta-primary,
            .btn-cta-outline {
                width: 100%;
                justify-content: center;
            }
            .article-banner .banner-meta {
                gap: 8px;
                font-size: 0.75rem;
            }
            .article-share-row {
                justify-content: center;
            }
            .article-tags-row {
                justify-content: center;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1a56db;
            --color-primary-hover: #1e40af;
            --color-primary-light: #3b82f6;
            --color-accent: #06b6d4;
            --color-accent-glow: rgba(6, 182, 212, 0.35);
            --color-bg: #f8fafc;
            --color-bg-dark: #0f172a;
            --color-bg-card: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.06);
            --shadow-glow: 0 0 32px rgba(26, 86, 219, 0.25);
            --transition-fast: 0.18s 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-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --glass-bg: rgba(255,255,255,0.72);
            --glass-border: rgba(255,255,255,0.55);
            --glass-shadow: 0 4px 24px rgba(0,0,0,0.06);
            --glass-blur: saturate(180%) blur(16px);
        }

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

        html {
            scroll-behavior: smooth;
            -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);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul, ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 0;
            transition: all var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(255,255,255,0.94);
            backdrop-filter: saturate(180%) blur(20px);
            -webkit-backdrop-filter: saturate(180%) blur(20px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.08);
            border-bottom: 1px solid rgba(226,232,240,0.6);
        }

        .site-header .navbar {
            padding: 16px 0;
            transition: padding var(--transition-base);
        }

        .site-header.scrolled .navbar {
            padding: 10px 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: -0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: color var(--transition-fast);
            z-index: 2;
        }

        .nav-logo:hover {
            color: var(--color-primary);
        }

        .logo-dot {
            display: inline-block;
            width: 11px;
            height: 11px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
            box-shadow: 0 0 14px var(--color-accent-glow);
            flex-shrink: 0;
            animation: logoPulse 2.4s ease-in-out infinite;
        }

        @keyframes logoPulse {
            0%, 100% { box-shadow: 0 0 10px rgba(6,182,212,0.25); }
            50% { box-shadow: 0 0 22px rgba(6,182,212,0.55); }
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
        }

        .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #475569;
            border-radius: 50px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            text-decoration: none;
            position: relative;
        }

        .nav-link-item:hover {
            color: var(--color-primary);
            background: rgba(26,86,219,0.06);
        }

        .nav-link-item.active {
            color: var(--color-primary);
            background: rgba(26,86,219,0.10);
            font-weight: 700;
        }

        .nav-link-item.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--color-primary);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 0.9rem;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
            text-decoration: none;
            box-shadow: 0 4px 14px rgba(26,86,219,0.30);
            margin-left: 6px;
        }

        .nav-cta-btn:hover {
            background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary));
            box-shadow: 0 6px 20px rgba(26,86,219,0.40);
            transform: translateY(-2px);
            color: #ffffff;
        }

        .nav-cta-btn:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26,86,219,0.25);
        }

        .navbar-toggler {
            display: none;
            background: rgba(255,255,255,0.6);
            border: 1px solid rgba(226,232,240,0.7);
            border-radius: 10px;
            padding: 8px 12px;
            cursor: pointer;
            color: #475569;
            transition: all var(--transition-fast);
            z-index: 2;
        }

        .navbar-toggler:hover {
            background: rgba(255,255,255,0.9);
            border-color: #cbd5e1;
            color: var(--color-primary);
        }

        .mobile-menu {
            display: none;
            background: rgba(255,255,255,0.96);
            backdrop-filter: saturate(180%) blur(24px);
            -webkit-backdrop-filter: saturate(180%) blur(24px);
            border-bottom: 1px solid var(--color-border);
            padding: 16px 24px;
            flex-direction: column;
            gap: 6px;
            box-shadow: var(--shadow-lg);
        }

        .mobile-menu .nav-link-item,
        .mobile-menu .nav-cta-btn {
            display: flex;
            width: 100%;
            justify-content: center;
            border-radius: 50px;
            padding: 12px 20px;
            font-size: 1rem;
            margin: 2px 0;
        }

        .mobile-menu .nav-cta-btn {
            margin-left: 0;
            margin-top: 6px;
        }

        @media (max-width: 991.98px) {
            .nav-links-desktop {
                display: none;
            }
            .navbar-toggler {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .mobile-menu.collapse:not(.show) {
                display: none;
            }
            .mobile-menu.show,
            .mobile-menu.collapsing {
                display: flex;
            }
        }

        @media (min-width: 992px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* ========== CATEGORY BANNER ========== */
        .category-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            background: linear-gradient(160deg, #0f172a 0%, #1e293b 40%, #0c1929 100%);
            overflow: hidden;
            padding-top: 90px;
            padding-bottom: 60px;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 0;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 30% 50%, rgba(26,86,219,0.18) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(6,182,212,0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 80%, rgba(16,185,129,0.08) 0%, transparent 50%);
            z-index: 1;
        }

        .category-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            font-size: 0.9rem;
        }

        .breadcrumb-custom a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: color var(--transition-fast);
            font-weight: 500;
        }

        .breadcrumb-custom a:hover {
            color: #ffffff;
        }

        .breadcrumb-sep {
            color: rgba(255,255,255,0.4);
            font-size: 0.75rem;
        }

        .breadcrumb-current {
            color: rgba(255,255,255,0.95);
            font-weight: 700;
        }

        .category-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.03em;
            margin-bottom: 14px;
            line-height: 1.2;
        }

        .category-banner .banner-subtitle {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.7);
            max-width: 600px;
            line-height: 1.7;
        }

        .banner-stats-row {
            display: flex;
            gap: 40px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .banner-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255,255,255,0.9);
        }

        .banner-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1;
        }

        .banner-stat-label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
        }

        @media (max-width: 768px) {
            .category-banner {
                min-height: 300px;
                padding-top: 80px;
                padding-bottom: 40px;
            }
            .category-banner h1 {
                font-size: 2rem;
            }
            .category-banner .banner-subtitle {
                font-size: 1rem;
            }
            .banner-stats-row {
                gap: 24px;
            }
            .banner-stat-num {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .category-banner h1 {
                font-size: 1.6rem;
            }
            .banner-stats-row {
                gap: 16px;
            }
        }

        /* ========== FILTER BAR ========== */
        .filter-bar {
            background: var(--color-bg-card);
            border-bottom: 1px solid var(--color-border);
            padding: 16px 0;
            position: sticky;
            top: 70px;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            transition: top var(--transition-base);
        }

        .site-header.scrolled ~ .filter-bar {
            top: 62px;
        }

        .filter-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
        }

        .filter-tabs {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .filter-tab {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-text-secondary);
            background: transparent;
            border: 1.5px solid transparent;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }

        .filter-tab:hover {
            color: var(--color-primary);
            background: rgba(26,86,219,0.04);
        }

        .filter-tab.active {
            color: var(--color-primary);
            background: rgba(26,86,219,0.08);
            border-color: rgba(26,86,219,0.25);
            font-weight: 700;
        }

        .filter-result-info {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        .filter-result-info strong {
            color: var(--color-text);
            font-weight: 700;
        }

        @media (max-width: 768px) {
            .filter-bar {
                top: 60px;
                padding: 12px 0;
            }
            .filter-bar-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .filter-tabs {
                gap: 4px;
            }
            .filter-tab {
                padding: 6px 14px;
                font-size: 0.82rem;
            }
        }

        /* ========== ARTICLES GRID ========== */
        .articles-section {
            padding: 56px 0 60px;
            background: var(--color-bg);
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
            position: relative;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(26,86,219,0.18);
        }

        .article-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #f1f5f9;
        }

        .article-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .article-card-img-wrap img {
            transform: scale(1.06);
        }

        .article-card-img-wrap .card-category-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 13px;
            border-radius: 50px;
            font-size: 0.76rem;
            font-weight: 700;
            background: rgba(15,23,42,0.78);
            color: #ffffff;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            z-index: 2;
            letter-spacing: 0.01em;
        }

        .article-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card-date {
            font-size: 0.8rem;
            color: var(--color-text-light);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .article-card-date i {
            font-size: 0.7rem;
        }

        .article-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .article-card:hover .article-card-title {
            color: var(--color-primary);
        }

        .article-card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
            gap: 8px;
        }

        .article-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .card-tag {
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: 50px;
            background: rgba(26,86,219,0.06);
            color: var(--color-primary);
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .article-card:hover .card-tag {
            background: rgba(26,86,219,0.12);
        }

        .card-read-more {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .card-read-more i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }

        .article-card:hover .card-read-more i {
            transform: translateX(3px);
        }

        .card-read-more:hover {
            color: var(--color-primary-hover);
        }

        @media (max-width: 1024px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 640px) {
            .articles-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .articles-section {
                padding: 36px 0 40px;
            }
            .article-card-body {
                padding: 16px 16px 18px;
            }
            .article-card-title {
                font-size: 1rem;
            }
        }

        /* ========== PAGINATION ========== */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: 44px;
        }

        .pagination-custom {
            display: flex;
            gap: 5px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .page-item-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 10px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-secondary);
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .page-item-custom:hover {
            color: var(--color-primary);
            border-color: rgba(26,86,219,0.3);
            background: rgba(26,86,219,0.04);
        }

        .page-item-custom.active {
            color: #ffffff;
            background: var(--color-primary);
            border-color: var(--color-primary);
            box-shadow: 0 2px 10px rgba(26,86,219,0.30);
            font-weight: 700;
        }

        .page-item-custom.disabled {
            opacity: 0.45;
            pointer-events: none;
            cursor: not-allowed;
        }

        /* ========== TAGS CLOUD SECTION ========== */
        .tags-section {
            padding: 48px 0 56px;
            background: #ffffff;
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }

        .tags-section .section-label {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .tags-section h2 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--color-text);
            letter-spacing: -0.02em;
        }

        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-secondary);
            background: var(--color-bg);
            border: 1.5px solid var(--color-border);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }

        .tag-cloud-item:hover {
            color: var(--color-primary);
            border-color: rgba(26,86,219,0.35);
            background: rgba(26,86,219,0.04);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .tag-cloud-item.hot {
            color: #ffffff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            border-color: transparent;
            box-shadow: 0 3px 14px rgba(26,86,219,0.30);
        }

        .tag-cloud-item.hot:hover {
            box-shadow: 0 6px 20px rgba(26,86,219,0.40);
            transform: translateY(-3px);
            color: #ffffff;
        }

        .tag-count {
            font-size: 0.72rem;
            font-weight: 400;
            opacity: 0.7;
        }

        /* ========== STATS STRIP ========== */
        .stats-strip {
            padding: 52px 0;
            background: var(--color-bg-dark);
            position: relative;
            overflow: hidden;
        }

        .stats-strip::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 20% 50%, rgba(26,86,219,0.10) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 30%, rgba(6,182,212,0.07) 0%, transparent 50%);
            z-index: 0;
        }

        .stats-strip .container {
            position: relative;
            z-index: 1;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-card-dark {
            padding: 10px;
        }

        .stat-icon-dark {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 12px;
        }

        .stat-number-dark {
            font-size: 2.4rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1;
            margin-bottom: 6px;
        }

        .stat-label-dark {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stat-number-dark {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .stat-number-dark {
                font-size: 1.5rem;
            }
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(160deg, #f8fafc 0%, #ffffff 50%, #f1f5f9 100%);
            text-align: center;
        }

        .cta-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--color-border-light);
            max-width: 720px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26,86,219,0.07) 0%, transparent 70%);
            z-index: 0;
        }

        .cta-card .cta-content {
            position: relative;
            z-index: 1;
        }

        .cta-card h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .cta-card p {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .cta-input-group {
            display: flex;
            gap: 10px;
            max-width: 460px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-input {
            flex: 1;
            min-width: 220px;
            padding: 13px 20px;
            border-radius: 50px;
            border: 1.5px solid var(--color-border);
            font-size: 0.95rem;
            outline: none;
            transition: all var(--transition-fast);
            background: var(--color-bg);
        }

        .cta-input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(26,86,219,0.08);
        }

        .cta-submit-btn {
            padding: 13px 32px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(26,86,219,0.30);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .cta-submit-btn:hover {
            background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary));
            box-shadow: 0 8px 24px rgba(26,86,219,0.40);
            transform: translateY(-2px);
        }

        .cta-submit-btn:active {
            transform: translateY(0);
        }

        @media (max-width: 640px) {
            .cta-card {
                padding: 32px 20px;
            }
            .cta-card h2 {
                font-size: 1.5rem;
            }
            .cta-input-group {
                flex-direction: column;
                align-items: center;
            }
            .cta-input {
                width: 100%;
            }
            .cta-submit-btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 52px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #ffffff;
            display: block;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.55);
            text-decoration: none;
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .footer-col ul li a:hover {
            color: #ffffff;
        }

        .footer-col ul li a i {
            font-size: 0.8rem;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 22px;
            border-top: 1px solid rgba(255,255,255,0.10);
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== CONTAINER ========== */
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
            margin: 0 auto;
        }

        @media (max-width: 1200px) {
            .container {
                max-width: 100%;
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ========== UTILITY ========== */
        .text-center { text-align: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

        /* ========== FOCUS ========== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
        }

        /* ========== SMOOTH SCROLL OFFSET ========== */
        @media (min-width: 992px) {
            html {
                scroll-padding-top: 90px;
            }
        }
        @media (max-width: 991.98px) {
            html {
                scroll-padding-top: 72px;
            }
        }