/* roulang page: index */
:root {
            --brand-600: #1a44f5;
            --brand-700: #1333e1;
            --brand-800: #162bb6;
            --accent-500: #f98d07;
            --accent-400: #ffb020;
            --surface-50: #f8fafc;
            --surface-100: #f1f5f9;
            --surface-700: #334155;
            --surface-800: #1e293b;
            --surface-900: #0f172a;
            --surface-950: #020617;
            --radius-xl: 1rem;
            --radius-2xl: 1.25rem;
            --radius-3xl: 1.5rem;
            --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
            --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.10), 0 8px 10px -6px rgba(0,0,0,0.05);
            --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.15);
        }
        *,*::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:'Inter','PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;line-height:1.6;color:#1e293b;background:#f8fafc;overflow-x:hidden}
        a{color:inherit;text-decoration:none;transition:color 0.2s ease}
        img{max-width:100%;height:auto;display:block}
        button,input{font-family:inherit}
        .container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
        @media(min-width:768px){.container{padding:0 2rem}}
        @media(min-width:1024px){.container{padding:0 2.5rem}}

        /* Header & Nav */
        .site-header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:var(--shadow-md)}
        .header-top{border-bottom:1px solid #e2e8f0;padding:0.75rem 0}
        .header-top-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem}
        .logo-link{display:flex;align-items:center;gap:0.5rem;font-weight:700;font-size:1.25rem;color:#0f172a;white-space:nowrap;letter-spacing:-0.01em}
        .logo-link:hover{color:var(--brand-600)}
        .logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--brand-600),var(--brand-800));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;flex-shrink:0}
        .header-actions{display:flex;align-items:center;gap:0.75rem}
        .header-search{display:none;align-items:center;gap:0.5rem;background:#f1f5f9;border-radius:2rem;padding:0.5rem 1rem;border:1px solid transparent;transition:all 0.2s ease}
        @media(min-width:768px){.header-search{display:flex}}
        .header-search:focus-within{border-color:var(--brand-600);background:#fff;box-shadow:0 0 0 3px rgba(26,68,245,0.08)}
        .header-search input{border:none;background:transparent;outline:none;font-size:0.875rem;color:#334155;width:160px}
        .header-search input::placeholder{color:#94a3b8}
        .header-search button{background:none;border:none;color:#64748b;cursor:pointer;padding:0;font-size:0.9rem;transition:color 0.2s}
        .header-search button:hover{color:var(--brand-600)}
        .btn-cta-sm{display:inline-flex;align-items:center;gap:0.4rem;background:var(--brand-600);color:#fff;padding:0.5rem 1.1rem;border-radius:2rem;font-size:0.875rem;font-weight:600;white-space:nowrap;transition:all 0.2s ease;border:none;cursor:pointer}
        .btn-cta-sm:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-lg)}
        .btn-cta-sm:active{transform:translateY(0)}

        /* Channel Tabs Nav */
        .nav-channels{background:#fff;padding:0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
        .nav-channels::-webkit-scrollbar{display:none}
        .nav-channels-inner{display:flex;align-items:center;gap:0.25rem;padding:0.5rem 0;min-width:max-content}
        .nav-channel-link{display:inline-flex;align-items:center;gap:0.35rem;padding:0.55rem 1.1rem;border-radius:2rem;font-size:0.9rem;font-weight:500;color:#475569;white-space:nowrap;transition:all 0.2s ease;position:relative;cursor:pointer}
        .nav-channel-link:hover{color:var(--brand-600);background:#eef4ff}
        .nav-channel-link.active{color:#fff;background:var(--brand-600);font-weight:600;box-shadow:var(--shadow-sm)}
        .nav-channel-link.active:hover{background:var(--brand-700);color:#fff}
        .nav-channel-link i{font-size:0.8rem;opacity:0.7}
        .nav-channel-link.active i{opacity:1}

        /* Mobile menu toggle */
        .mobile-menu-toggle{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:none;background:#f1f5f9;border-radius:10px;cursor:pointer;font-size:1.2rem;color:#475569;transition:all 0.2s}
        .mobile-menu-toggle:hover{background:#e2e8f0;color:#1e293b}
        @media(min-width:768px){.mobile-menu-toggle{display:none}}
        .mobile-nav-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:99}
        .mobile-nav-overlay.open{display:block}
        .mobile-nav-panel{position:fixed;top:0;right:-300px;width:280px;height:100vh;background:#fff;z-index:100;padding:1.5rem;overflow-y:auto;transition:right 0.3s ease;box-shadow:var(--shadow-2xl)}
        .mobile-nav-panel.open{right:0}
        .mobile-nav-panel .nav-channel-link{display:flex;width:100%;padding:0.75rem 1rem;border-radius:0.75rem;margin-bottom:0.25rem}
        .mobile-nav-close{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;background:#f1f5f9;border-radius:50%;cursor:pointer;font-size:1rem;color:#475569;margin-bottom:1rem;transition:all 0.2s}
        .mobile-nav-close:hover{background:#e2e8f0}

        /* Hero */
        .hero-section{position:relative;background:linear-gradient(135deg,#0f172a 0%,#1a2b5e 40%,#16238a 70%,#0f1b4d 100%);overflow:hidden;padding:5rem 0 4rem}
        @media(min-width:768px){.hero-section{padding:7rem 0 5rem}}
        .hero-bg-img{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:0.18;mix-blend-mode:overlay}
        .hero-glow{position:absolute;top:-200px;right:-200px;width:600px;height:600px;background:radial-gradient(circle,rgba(51,102,255,0.25) 0%,transparent 70%);pointer-events:none}
        .hero-glow-2{position:absolute;bottom:-150px;left:-150px;width:500px;height:500px;background:radial-gradient(circle,rgba(255,176,32,0.12) 0%,transparent 70%);pointer-events:none}
        .hero-content{position:relative;z-index:2;text-align:center;max-width:800px;margin:0 auto}
        .hero-badge{display:inline-flex;align-items:center;gap:0.5rem;background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.2);color:#ffdd88;padding:0.45rem 1.2rem;border-radius:2rem;font-size:0.85rem;font-weight:500;margin-bottom:1.5rem;backdrop-filter:blur(8px)}
        .hero-badge i{font-size:0.75rem;color:#ffb020}
        .hero-title{font-size:2.2rem;font-weight:800;color:#fff;line-height:1.25;margin-bottom:1.25rem;letter-spacing:-0.02em}
        @media(min-width:768px){.hero-title{font-size:3rem}}
        @media(min-width:1024px){.hero-title{font-size:3.5rem}}
        .hero-title span{background:linear-gradient(135deg,#ffdd88 0%,#ffb020 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
        .hero-subtitle{font-size:1.05rem;color:#cbd5e1;line-height:1.7;margin-bottom:2rem;max-width:620px;margin-left:auto;margin-right:auto}
        @media(min-width:768px){.hero-subtitle{font-size:1.15rem}}
        .hero-buttons{display:flex;flex-wrap:wrap;gap:0.75rem;justify-content:center}
        .btn-hero-primary{display:inline-flex;align-items:center;gap:0.5rem;background:#fff;color:#0f172a;padding:0.85rem 2rem;border-radius:3rem;font-size:1rem;font-weight:600;transition:all 0.25s ease;box-shadow:0 4px 20px rgba(0,0,0,0.2);border:none;cursor:pointer}
        .btn-hero-primary:hover{background:#f1f5f9;transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,0,0,0.3)}
        .btn-hero-secondary{display:inline-flex;align-items:center;gap:0.5rem;background:rgba(255,255,255,0.08);color:#fff;padding:0.85rem 2rem;border-radius:3rem;font-size:1rem;font-weight:500;border:1px solid rgba(255,255,255,0.3);transition:all 0.25s ease;cursor:pointer;backdrop-filter:blur(4px)}
        .btn-hero-secondary:hover{background:rgba(255,255,255,0.16);border-color:rgba(255,255,255,0.5);transform:translateY(-2px)}

        /* Section */
        .section{padding:4rem 0}
        @media(min-width:768px){.section{padding:5rem 0}}
        .section-header{text-align:center;margin-bottom:3rem}
        .section-label{display:inline-block;font-size:0.8rem;font-weight:600;text-transform:uppercase;letter-spacing:0.08em;color:var(--brand-600);background:#eef4ff;padding:0.35rem 1rem;border-radius:2rem;margin-bottom:0.75rem}
        .section-title{font-size:1.75rem;font-weight:700;color:#0f172a;margin-bottom:0.75rem;letter-spacing:-0.01em}
        @media(min-width:768px){.section-title{font-size:2.1rem}}
        .section-desc{font-size:1rem;color:#64748b;max-width:600px;margin:0 auto;line-height:1.65}

        /* Stats */
        .stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}
        @media(min-width:768px){.stats-grid{grid-template-columns:repeat(4,1fr);gap:1.5rem}}
        .stat-card{background:#fff;border-radius:var(--radius-2xl);padding:1.75rem 1.25rem;text-align:center;box-shadow:var(--shadow-md);border:1px solid #e2e8f0;transition:all 0.3s ease}
        .stat-card:hover{box-shadow:var(--shadow-xl);transform:translateY(-3px);border-color:#cbd5e1}
        .stat-number{font-size:2rem;font-weight:800;color:#0f172a;line-height:1.1;margin-bottom:0.4rem}
        @media(min-width:768px){.stat-number{font-size:2.5rem}}
        .stat-number span{color:var(--brand-600)}
        .stat-label{font-size:0.875rem;color:#64748b;font-weight:500}

        /* Service Cards */
        .cards-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}
        @media(min-width:640px){.cards-grid{grid-template-columns:repeat(2,1fr)}}
        @media(min-width:1024px){.cards-grid{grid-template-columns:repeat(3,1fr)}}
        .service-card{background:#fff;border-radius:var(--radius-2xl);overflow:hidden;box-shadow:var(--shadow-md);border:1px solid #e2e8f0;transition:all 0.3s ease;display:flex;flex-direction:column}
        .service-card:hover{box-shadow:var(--shadow-xl);transform:translateY(-4px);border-color:#cbd5e1}
        .service-card-img{height:200px;overflow:hidden;position:relative}
        .service-card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
        .service-card:hover .service-card-img img{transform:scale(1.05)}
        .service-card-body{padding:1.5rem;flex:1;display:flex;flex-direction:column}
        .service-card-tag{display:inline-block;font-size:0.75rem;font-weight:600;color:var(--brand-600);background:#eef4ff;padding:0.25rem 0.75rem;border-radius:1rem;margin-bottom:0.75rem;width:fit-content}
        .service-card-title{font-size:1.1rem;font-weight:700;color:#0f172a;margin-bottom:0.5rem;line-height:1.4}
        .service-card-desc{font-size:0.9rem;color:#64748b;line-height:1.6;margin-bottom:1rem;flex:1}
        .service-card-link{display:inline-flex;align-items:center;gap:0.35rem;font-size:0.9rem;font-weight:600;color:var(--brand-600);transition:gap 0.2s ease}
        .service-card-link:hover{gap:0.6rem;color:var(--brand-700)}
        .service-card-link i{font-size:0.8rem}

        /* CMS List */
        .cms-list{display:flex;flex-direction:column;gap:0.75rem}
        .cms-list-item{display:flex;align-items:flex-start;gap:1rem;background:#fff;border-radius:var(--radius-xl);padding:1.25rem;box-shadow:var(--shadow-sm);border:1px solid #e2e8f0;transition:all 0.25s ease;text-decoration:none;color:inherit}
        .cms-list-item:hover{box-shadow:var(--shadow-lg);border-color:#cbd5e1;transform:translateX(3px)}
        .cms-item-meta{flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:0.3rem;min-width:52px}
        .cms-item-date{font-size:0.7rem;color:#94a3b8;font-weight:500;text-align:center}
        .cms-item-badge{font-size:0.68rem;font-weight:600;color:var(--brand-600);background:#eef4ff;padding:0.2rem 0.6rem;border-radius:1rem;white-space:nowrap}
        .cms-item-content{flex:1;min-width:0}
        .cms-item-title{font-size:1rem;font-weight:600;color:#0f172a;margin-bottom:0.35rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .cms-item-summary{font-size:0.85rem;color:#64748b;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .cms-empty{text-align:center;padding:3rem 1rem;color:#94a3b8;font-size:0.95rem}

        /* Category Entry Cards */
        .cat-cards-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}
        @media(min-width:768px){.cat-cards-grid{grid-template-columns:repeat(3,1fr)}}
        .cat-card{position:relative;background:#fff;border-radius:var(--radius-2xl);padding:2rem 1.5rem;box-shadow:var(--shadow-md);border:1px solid #e2e8f0;transition:all 0.3s ease;overflow:hidden;display:flex;flex-direction:column;align-items:flex-start;text-decoration:none;color:inherit}
        .cat-card:hover{box-shadow:var(--shadow-xl);transform:translateY(-4px);border-color:var(--brand-300)}
        .cat-card-icon{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:1rem;flex-shrink:0}
        .cat-card-icon.c1{background:#eef4ff;color:var(--brand-600)}
        .cat-card-icon.c2{background:#fff9eb;color:var(--accent-500)}
        .cat-card-icon.c3{background:#f0fdf4;color:#16a34a}
        .cat-card h3{font-size:1.1rem;font-weight:700;color:#0f172a;margin-bottom:0.5rem}
        .cat-card p{font-size:0.9rem;color:#64748b;line-height:1.6;margin-bottom:1rem;flex:1}
        .cat-card-arrow{display:inline-flex;align-items:center;gap:0.3rem;font-size:0.9rem;font-weight:600;color:var(--brand-600);transition:gap 0.2s}
        .cat-card:hover .cat-card-arrow{gap:0.55rem}

        /* Features */
        .features-grid{display:grid;grid-template-columns:1fr;gap:2rem}
        @media(min-width:768px){.features-grid{grid-template-columns:repeat(2,1fr);gap:2.5rem}}
        .feature-item{display:flex;gap:1rem;align-items:flex-start}
        .feature-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0;background:#eef4ff;color:var(--brand-600)}
        .feature-text h4{font-size:1.05rem;font-weight:700;color:#0f172a;margin-bottom:0.35rem}
        .feature-text p{font-size:0.9rem;color:#64748b;line-height:1.6}

        /* FAQ */
        .faq-list{max-width:750px;margin:0 auto;display:flex;flex-direction:column;gap:0.75rem}
        .faq-item{background:#fff;border-radius:var(--radius-xl);border:1px solid #e2e8f0;overflow:hidden;transition:all 0.2s ease}
        .faq-item:hover{border-color:#cbd5e1}
        .faq-question{width:100%;text-align:left;padding:1.15rem 1.5rem;font-size:0.98rem;font-weight:600;color:#0f172a;background:none;border:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:1rem;line-height:1.5}
        .faq-question i{font-size:0.85rem;color:#94a3b8;transition:transform 0.3s ease;flex-shrink:0}
        .faq-item.open .faq-question i{transform:rotate(180deg);color:var(--brand-600)}
        .faq-answer{max-height:0;overflow:hidden;transition:max-height 0.35s ease,padding 0.35s ease}
        .faq-item.open .faq-answer{max-height:300px}
        .faq-answer-inner{padding:0 1.5rem 1.25rem;font-size:0.9rem;color:#64748b;line-height:1.7}

        /* CTA Section */
        .cta-section{position:relative;background:linear-gradient(135deg,var(--brand-800) 0%,var(--brand-600) 50%,var(--brand-700) 100%);overflow:hidden;text-align:center;padding:4rem 1.5rem}
        @media(min-width:768px){.cta-section{padding:5rem 2rem}}
        .cta-bg-pattern{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');background-size:cover;background-position:center;opacity:0.08;mix-blend-mode:soft-light}
        .cta-content{position:relative;z-index:2;max-width:650px;margin:0 auto}
        .cta-content h2{font-size:1.8rem;font-weight:800;color:#fff;margin-bottom:1rem;letter-spacing:-0.01em}
        @media(min-width:768px){.cta-content h2{font-size:2.2rem}}
        .cta-content p{font-size:1rem;color:#cbd5e1;margin-bottom:2rem;line-height:1.6}
        .btn-cta-large{display:inline-flex;align-items:center;gap:0.5rem;background:#fff;color:#0f172a;padding:0.9rem 2.5rem;border-radius:3rem;font-size:1rem;font-weight:600;transition:all 0.25s ease;box-shadow:0 6px 25px rgba(0,0,0,0.25);border:none;cursor:pointer}
        .btn-cta-large:hover{background:#f1f5f9;transform:translateY(-3px);box-shadow:0 10px 35px rgba(0,0,0,0.35)}

        /* Footer */
        .site-footer{background:#0f172a;color:#cbd5e1;padding:3rem 0 2rem}
        .footer-grid{display:grid;grid-template-columns:1fr;gap:2rem;margin-bottom:2rem}
        @media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:2.5rem}}
        .footer-brand h3{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:0.75rem}
        .footer-brand p{font-size:0.875rem;line-height:1.7;color:#94a3b8}
        .footer-links h4{font-size:0.85rem;font-weight:700;color:#e2e8f0;text-transform:uppercase;letter-spacing:0.06em;margin-bottom:0.75rem}
        .footer-links ul{list-style:none;padding:0}
        .footer-links li{margin-bottom:0.5rem}
        .footer-links a{font-size:0.875rem;color:#94a3b8;transition:color 0.2s}
        .footer-links a:hover{color:#fff}
        .footer-bottom{border-top:1px solid #1e293b;padding-top:1.5rem;text-align:center;font-size:0.8rem;color:#64748b}

/* roulang page: article */
:root {
            --color-brand-500: #5c6ef8;
            --color-brand-600: #4c51e0;
            --color-brand-700: #3b3fc4;
            --color-accent-500: #14b8a6;
            --color-accent-600: #0d9488;
            --color-surface-50: #f8fafc;
            --color-surface-100: #f1f5f9;
            --color-surface-200: #e2e8f0;
            --color-surface-700: #334155;
            --color-surface-800: #1e293b;
            --color-surface-900: #0f172a;
            --shadow-soft: 0 2px 16px rgba(0,0,0,0.06);
            --shadow-card: 0 4px 24px rgba(0,0,0,0.07);
            --shadow-elevated: 0 8px 40px rgba(0,0,0,0.10);
            --radius-xl: 0.875rem;
            --radius-2xl: 1.125rem;
            --radius-3xl: 1.5rem;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,*::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:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;line-height:1.7;color:#1e293b;background-color:#f8fafc;overflow-x:hidden}

        img{max-width:100%;height:auto;display:block}
        a{text-decoration:none;color:inherit;transition:color var(--transition-base)}
        button{cursor:pointer;font-family:inherit}
        ul,ol{list-style:none}
        input,textarea{font-family:inherit}

        .container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.5rem}
        @media (max-width:768px){.container{padding:0 1rem}}

        /* Header & Nav */
        .site-header{background:#ffffff;position:sticky;top:0;z-index:1000;box-shadow:0 1px 3px rgba(0,0,0,0.04),0 1px 2px rgba(0,0,0,0.03)}
        .header-top{padding:0.75rem 0;border-bottom:1px solid #f1f5f9}
        .header-top-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem}
        .logo-link{display:flex;align-items:center;gap:0.625rem;font-weight:700;font-size:1.25rem;color:#1e293b;white-space:nowrap;transition:color var(--transition-base)}
        .logo-link:hover{color:var(--color-brand-600)}
        .logo-icon{width:2.25rem;height:2.25rem;background:linear-gradient(135deg,var(--color-brand-500),var(--color-brand-700));border-radius:0.625rem;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;flex-shrink:0}
        .header-search{display:flex;align-items:center;gap:0;background:#f8fafc;border-radius:2rem;padding:0.4rem 0.4rem 0.4rem 1rem;border:1.5px solid #e2e8f0;transition:all var(--transition-base);min-width:240px}
        .header-search:focus-within{border-color:var(--color-brand-500);box-shadow:0 0 0 3px rgba(92,110,248,0.08);background:#fff}
        .header-search input{border:none;background:transparent;outline:none;flex:1;font-size:0.9rem;color:#334155;min-width:0}
        .header-search button{background:var(--color-brand-500);color:#fff;border:none;border-radius:2rem;padding:0.5rem 1.1rem;font-size:0.875rem;font-weight:600;transition:all var(--transition-base);white-space:nowrap}
        .header-search button:hover{background:var(--color-brand-600);box-shadow:0 4px 12px rgba(92,110,248,0.3)}

        .nav-channels{background:#ffffff;border-bottom:1px solid #f1f5f9}
        .nav-channels-inner{display:flex;align-items:center;gap:0.25rem;overflow-x:auto;padding:0.5rem 0;-webkit-overflow-scrolling:touch;scrollbar-width:none}
        .nav-channels-inner::-webkit-scrollbar{display:none}
        .nav-channel-link{display:inline-flex;align-items:center;gap:0.4rem;padding:0.55rem 1.1rem;border-radius:2rem;font-size:0.9rem;font-weight:500;color:#475569;white-space:nowrap;transition:all var(--transition-base);flex-shrink:0}
        .nav-channel-link:hover{color:var(--color-brand-600);background:#eef2ff}
        .nav-channel-link.active{background:var(--color-brand-500);color:#fff;font-weight:600;box-shadow:0 2px 8px rgba(92,110,248,0.25)}
        .nav-channel-link.active:hover{background:var(--color-brand-600);color:#fff}
        .nav-channel-link i{font-size:0.85rem}

        @media (max-width:768px){
            .header-search{min-width:0;flex:1;max-width:220px}
            .header-search button{padding:0.45rem 0.8rem;font-size:0.8rem}
            .logo-link{font-size:1.05rem}
            .logo-icon{width:1.85rem;height:1.85rem;font-size:0.9rem;border-radius:0.5rem}
        }
        @media (max-width:520px){
            .header-search{max-width:160px;padding:0.35rem 0.35rem 0.35rem 0.7rem}
            .header-search input{font-size:0.8rem}
            .header-search button{font-size:0.75rem;padding:0.4rem 0.7rem}
            .logo-link{font-size:0.95rem;gap:0.4rem}
            .logo-icon{width:1.6rem;height:1.6rem;font-size:0.8rem}
            .nav-channel-link{font-size:0.78rem;padding:0.45rem 0.8rem}
        }

        /* Breadcrumb Banner */
        .breadcrumb-banner{background:linear-gradient(135deg,rgba(30,41,89,0.88),rgba(30,41,89,0.78)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;padding:2.25rem 0;color:#fff;position:relative}
        .breadcrumb-banner::after{content:'';position:absolute;inset:0;background:rgba(0,0,0,0.1);pointer-events:none}
        .breadcrumb-list{display:flex;align-items:center;flex-wrap:wrap;gap:0.35rem;font-size:0.875rem;position:relative;z-index:1}
        .breadcrumb-list a{color:rgba(255,255,255,0.85);transition:color var(--transition-base)}
        .breadcrumb-list a:hover{color:#fff;text-decoration:underline}
        .breadcrumb-sep{color:rgba(255,255,255,0.5);margin:0 0.15rem}
        .breadcrumb-current{color:#fff;font-weight:500}

        /* Article Main Layout */
        .article-layout{display:grid;grid-template-columns:1fr 320px;gap:2.5rem;padding:2.5rem 0}
        @media (max-width:1024px){.article-layout{grid-template-columns:1fr 280px;gap:2rem}}
        @media (max-width:768px){.article-layout{grid-template-columns:1fr;gap:2rem;padding:1.5rem 0}}

        /* Article Content Area */
        .article-main{min-width:0}
        .article-header{margin-bottom:2rem}
        .article-category-tag{display:inline-flex;align-items:center;gap:0.35rem;background:#eef2ff;color:var(--color-brand-700);padding:0.35rem 0.9rem;border-radius:2rem;font-size:0.825rem;font-weight:600;margin-bottom:0.875rem;transition:all var(--transition-base)}
        .article-category-tag:hover{background:var(--color-brand-500);color:#fff}
        .article-category-tag i{font-size:0.7rem}
        .article-title{font-size:2rem;font-weight:700;line-height:1.35;color:#0f172a;margin-bottom:1rem;letter-spacing:-0.01em}
        .article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;color:#64748b;font-size:0.875rem}
        .article-meta-item{display:inline-flex;align-items:center;gap:0.35rem}
        .article-meta-item i{font-size:0.8rem;color:#94a3b8}
        .article-featured-image{border-radius:var(--radius-2xl);overflow:hidden;margin-bottom:2rem;box-shadow:var(--shadow-card)}
        .article-featured-image img{width:100%;height:auto;display:block;object-fit:cover;aspect-ratio:16/9}
        .article-body{font-size:1.05rem;line-height:1.85;color:#334155}
        .article-body h2{font-size:1.5rem;font-weight:700;color:#0f172a;margin:2rem 0 1rem;padding-bottom:0.5rem;border-bottom:2px solid #f1f5f9}
        .article-body h3{font-size:1.25rem;font-weight:600;color:#1e293b;margin:1.5rem 0 0.75rem}
        .article-body p{margin-bottom:1.15rem}
        .article-body ul,.article-body ol{margin:0.75rem 0 1.15rem 1.5rem}
        .article-body ul{list-style:disc}
        .article-body ol{list-style:decimal}
        .article-body li{margin-bottom:0.4rem}
        .article-body blockquote{border-left:4px solid var(--color-brand-500);background:#f8fafc;padding:1rem 1.25rem;margin:1.25rem 0;border-radius:0 0.625rem 0.625rem 0;color:#475569;font-style:italic}
        .article-body img{border-radius:var(--radius-xl);margin:1.25rem auto;max-width:100%}
        .article-body code{background:#f1f5f9;padding:0.15rem 0.45rem;border-radius:0.35rem;font-size:0.9em;color:#e11d48}
        .article-body pre{background:#1e293b;color:#e2e8f0;padding:1.25rem;border-radius:var(--radius-xl);overflow-x:auto;margin:1.25rem 0;font-size:0.9rem;line-height:1.6}
        .article-body a{color:var(--color-brand-600);text-decoration:underline;text-underline-offset:2px}
        .article-body a:hover{color:var(--color-brand-700)}
        @media (max-width:768px){
            .article-title{font-size:1.5rem}
            .article-body{font-size:1rem;line-height:1.75}
            .article-body h2{font-size:1.3rem}
            .article-body h3{font-size:1.1rem}
        }

        /* Article Footer */
        .article-footer{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid #e2e8f0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem}
        .article-tags{display:flex;flex-wrap:wrap;gap:0.5rem}
        .article-tag{display:inline-block;background:#f1f5f9;color:#64748b;padding:0.3rem 0.75rem;border-radius:2rem;font-size:0.8rem;transition:all var(--transition-base)}
        .article-tag:hover{background:#e2e8f0;color:#334155}
        .article-share{display:flex;align-items:center;gap:0.5rem}
        .article-share span{font-size:0.825rem;color:#94a3b8;font-weight:500}
        .share-btn{width:2.2rem;height:2.2rem;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;border:1.5px solid #e2e8f0;color:#64748b;transition:all var(--transition-base);font-size:0.9rem;background:#fff}
        .share-btn:hover{border-color:var(--color-brand-500);color:var(--color-brand-500);background:#eef2ff;box-shadow:0 2px 8px rgba(92,110,248,0.15)}

        /* Sidebar */
        .article-sidebar{position:sticky;top:7rem;align-self:start}
        @media (max-width:768px){.article-sidebar{position:static}}
        .sidebar-card{background:#fff;border-radius:var(--radius-2xl);padding:1.5rem;margin-bottom:1.5rem;box-shadow:var(--shadow-soft);border:1px solid #f1f5f9}
        .sidebar-card h4{font-size:1rem;font-weight:700;color:#0f172a;margin-bottom:1rem;padding-bottom:0.6rem;border-bottom:2px solid #f1f5f9;display:flex;align-items:center;gap:0.4rem}
        .sidebar-card h4 i{color:var(--color-brand-500);font-size:0.85rem}
        .sidebar-about p{font-size:0.875rem;color:#64748b;line-height:1.65}
        .sidebar-links-list li{margin-bottom:0.6rem}
        .sidebar-links-list li:last-child{margin-bottom:0}
        .sidebar-links-list a{display:flex;align-items:center;gap:0.5rem;font-size:0.875rem;color:#475569;padding:0.5rem 0.75rem;border-radius:0.625rem;transition:all var(--transition-base)}
        .sidebar-links-list a:hover{background:#f8fafc;color:var(--color-brand-600)}
        .sidebar-links-list a i{font-size:0.75rem;color:#94a3b8;transition:color var(--transition-base)}
        .sidebar-links-list a:hover i{color:var(--color-brand-500)}

        /* Not Found */
        .not-found-state{text-align:center;padding:3rem 1.5rem;background:#fff;border-radius:var(--radius-2xl);box-shadow:var(--shadow-soft);border:1px solid #f1f5f9}
        .not-found-icon{font-size:3.5rem;color:#cbd5e1;margin-bottom:1rem}
        .not-found-state h3{font-size:1.35rem;font-weight:700;color:#0f172a;margin-bottom:0.5rem}
        .not-found-state p{color:#64748b;margin-bottom:1.5rem;font-size:0.95rem}
        .btn-back-home{display:inline-flex;align-items:center;gap:0.5rem;background:var(--color-brand-500);color:#fff;padding:0.7rem 1.5rem;border-radius:2rem;font-weight:600;font-size:0.9rem;transition:all var(--transition-base)}
        .btn-back-home:hover{background:var(--color-brand-600);box-shadow:0 6px 20px rgba(92,110,248,0.3);transform:translateY(-1px)}

        /* Related Posts */
        .related-section{padding:2.5rem 0 3.5rem}
        .related-section .section-label{font-size:1.35rem;font-weight:700;color:#0f172a;margin-bottom:1.5rem;display:flex;align-items:center;gap:0.5rem}
        .related-section .section-label i{color:var(--color-brand-500)}
        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
        @media (max-width:768px){.related-grid{grid-template-columns:repeat(2,1fr);gap:1rem}}
        @media (max-width:520px){.related-grid{grid-template-columns:1fr}}
        .related-card{background:#fff;border-radius:var(--radius-2xl);overflow:hidden;box-shadow:var(--shadow-soft);border:1px solid #f1f5f9;transition:all var(--transition-smooth)}
        .related-card:hover{box-shadow:var(--shadow-card);transform:translateY(-3px);border-color:#e2e8f0}
        .related-card-img{aspect-ratio:16/10;overflow:hidden;background:#f1f5f9}
        .related-card-img img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-smooth)}
        .related-card:hover .related-card-img img{transform:scale(1.04)}
        .related-card-body{padding:1rem 1.15rem 1.15rem}
        .related-card-body h5{font-size:0.95rem;font-weight:600;color:#1e293b;line-height:1.45;margin-bottom:0.4rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .related-card-body .related-card-meta{font-size:0.775rem;color:#94a3b8;display:flex;align-items:center;gap:0.4rem}
        .related-card-link{display:block}

        /* CTA Section */
        .cta-section{background:linear-gradient(135deg,#1e293b,#0f172a);padding:3rem 0;text-align:center;color:#fff}
        .cta-section h2{font-size:1.75rem;font-weight:700;margin-bottom:0.75rem}
        .cta-section p{color:#cbd5e1;margin-bottom:1.5rem;max-width:600px;margin-left:auto;margin-right:auto;font-size:0.95rem;line-height:1.7}
        .cta-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:0.875rem}
        .btn-cta-primary{display:inline-flex;align-items:center;gap:0.5rem;background:#fff;color:#1e293b;padding:0.75rem 1.75rem;border-radius:2rem;font-weight:600;font-size:0.95rem;transition:all var(--transition-base)}
        .btn-cta-primary:hover{background:#e2e8f0;box-shadow:0 8px 28px rgba(255,255,255,0.15);transform:translateY(-2px)}
        .btn-cta-outline{display:inline-flex;align-items:center;gap:0.5rem;background:transparent;color:#fff;padding:0.75rem 1.75rem;border-radius:2rem;font-weight:600;font-size:0.95rem;border:2px solid rgba(255,255,255,0.35);transition:all var(--transition-base)}
        .btn-cta-outline:hover{background:rgba(255,255,255,0.08);border-color:#fff;transform:translateY(-2px)}
        @media (max-width:768px){.cta-section h2{font-size:1.35rem}.cta-section{padding:2rem 0}}

        /* Footer */
        .site-footer{background:#1e293b;color:#cbd5e1;padding:2.5rem 0 1.5rem}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2rem}
        @media (max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:1.5rem}}
        @media (max-width:520px){.footer-grid{grid-template-columns:1fr}}
        .footer-brand h3{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:0.6rem}
        .footer-brand p{font-size:0.85rem;line-height:1.6;color:#94a3b8}
        .footer-links h4{font-size:0.95rem;font-weight:600;color:#fff;margin-bottom:0.75rem}
        .footer-links ul li{margin-bottom:0.45rem}
        .footer-links ul li:last-child{margin-bottom:0}
        .footer-links a{font-size:0.85rem;color:#94a3b8;transition:color var(--transition-base)}
        .footer-links a:hover{color:#fff}
        .footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:1.25rem;text-align:center;font-size:0.8rem;color:#64748b}

        /* Focus & Accessibility */
        a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--color-brand-500);outline-offset:2px;border-radius:4px}

/* roulang page: category1 */
:root {
            --color-primary: #1a1f3c;
            --color-primary-light: #26305a;
            --color-primary-dark: #111530;
            --color-accent: #e8613c;
            --color-accent-light: #f07a5c;
            --color-accent-dark: #c44a28;
            --color-accent-glow: #ff7a50;
            --color-brand-deep: #0d1127;
            --color-brand-navy: #1b2150;
            --color-brand-steel: #2c3a6e;
            --color-brand-ice: #e8ecf8;
            --color-text-primary: #1a1f2e;
            --color-text-secondary: #4a5068;
            --color-text-muted: #7b8096;
            --color-text-light: #a8aec6;
            --color-card-bg: #ffffff;
            --color-card-border: #e2e6f2;
            --color-card-hover: #f6f8fd;
            --radius-xl: 0.75rem;
            --radius-2xl: 1rem;
            --radius-3xl: 1.5rem;
            --shadow-card: 0 2px 16px rgba(26, 31, 60, 0.06);
            --shadow-elevated: 0 8px 32px rgba(26, 31, 60, 0.10);
            --shadow-glow: 0 0 40px rgba(232, 97, 60, 0.25);
            --shadow-card-hover: 0 12px 40px rgba(26, 31, 60, 0.13);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::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: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif; color: var(--color-text-primary); background: #f8fafc; line-height: 1.7; min-height: 100vh; }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color var(--transition-base); }
        ul { list-style: none; padding: 0; }
        button { cursor: pointer; border: none; font-family: inherit; }
        :focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; border-radius: 4px; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

        /* Header */
        .site-header { background: #ffffff; position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06); border-bottom: 1px solid #eef1f7; }
        .header-top { display: flex; align-items: center; justify-content: space-between; padding: 0.85rem 0; flex-wrap: wrap; gap: 0.75rem; }
        .header-logo { display: flex; align-items: center; gap: 0.6rem; font-size: 1.45rem; font-weight: 700; color: var(--color-primary); letter-spacing: 0.02em; white-space: nowrap; }
        .header-logo i { color: var(--color-accent); font-size: 1.55rem; }
        .header-logo:hover { color: var(--color-primary-light); }
        .header-actions { display: flex; align-items: center; gap: 0.75rem; }
        .header-search { display: flex; align-items: center; background: #f4f6fa; border-radius: 2rem; padding: 0.45rem 0.65rem 0.45rem 1.1rem; border: 2px solid transparent; transition: all var(--transition-base); }
        .header-search:focus-within { border-color: var(--color-accent); background: #fff; box-shadow: 0 0 0 6px rgba(232, 97, 60, 0.06); }
        .header-search input { border: none; background: transparent; padding: 0.35rem 0.5rem; font-size: 0.9rem; width: 180px; color: var(--color-text-primary); outline: none; }
        .header-search input::placeholder { color: var(--color-text-muted); }
        .header-search button { background: var(--color-accent); color: #fff; border-radius: 50%; width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; font-size: 0.85rem; transition: all var(--transition-base); flex-shrink: 0; }
        .header-search button:hover { background: var(--color-accent-dark); transform: scale(1.05); }
        .btn-outline-nav { padding: 0.5rem 1.2rem; border-radius: 2rem; border: 2px solid var(--color-primary); color: var(--color-primary); font-weight: 600; font-size: 0.88rem; transition: all var(--transition-base); white-space: nowrap; background: transparent; }
        .btn-outline-nav:hover { background: var(--color-primary); color: #fff; }

        /* Nav Channels */
        .nav-channels { background: var(--color-brand-deep); border-top: 1px solid rgba(255, 255, 255, 0.06); }
        .nav-channels-inner { display: flex; gap: 0.15rem; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; padding: 0.35rem 0; }
        .nav-channels-inner::-webkit-scrollbar { display: none; }
        .nav-channel-link { display: flex; align-items: center; gap: 0.4rem; padding: 0.6rem 1.15rem; border-radius: 2rem; font-size: 0.9rem; font-weight: 500; color: rgba(255, 255, 255, 0.78); white-space: nowrap; transition: all var(--transition-base); flex-shrink: 0; letter-spacing: 0.01em; }
        .nav-channel-link i { font-size: 0.85rem; opacity: 0.8; }
        .nav-channel-link:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
        .nav-channel-link.active { background: var(--color-accent); color: #fff; font-weight: 600; box-shadow: 0 4px 16px rgba(232, 97, 60, 0.35); }
        .nav-channel-link.active i { opacity: 1; }

        /* Mobile Nav */
        .mobile-menu-toggle { display: none; background: none; font-size: 1.5rem; color: var(--color-primary); padding: 0.4rem; border-radius: 0.5rem; }
        .mobile-menu-toggle:hover { background: #f4f6fa; }
        @media (max-width: 768px) {
            .header-search input { width: 110px; font-size: 0.82rem; }
            .header-logo { font-size: 1.2rem; }
            .btn-outline-nav { padding: 0.4rem 0.9rem; font-size: 0.8rem; }
            .nav-channel-link { padding: 0.5rem 0.85rem; font-size: 0.82rem; gap: 0.3rem; }
            .nav-channel-link i { font-size: 0.75rem; }
            .nav-channels-inner { gap: 0.05rem; }
        }
        @media (max-width: 520px) {
            .header-top { flex-direction: column; align-items: stretch; gap: 0.6rem; }
            .header-actions { justify-content: space-between; }
            .header-search { flex: 1; }
            .header-search input { width: 100%; }
            .btn-outline-nav { font-size: 0.78rem; padding: 0.4rem 0.75rem; }
            .nav-channel-link { font-size: 0.75rem; padding: 0.45rem 0.7rem; }
        }

        /* Hero */
        .hero-section { position: relative; background: linear-gradient(135deg, var(--color-brand-deep) 0%, var(--color-brand-navy) 40%, #1a2a5e 70%, var(--color-brand-steel) 100%); padding: 5rem 0 4.5rem; overflow: hidden; }
        .hero-bg-overlay { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.webp'); background-size: cover; background-position: center; opacity: 0.18; pointer-events: none; }
        .hero-glow { position: absolute; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, rgba(232, 97, 60, 0.25) 0%, transparent 70%); top: -120px; right: -80px; pointer-events: none; }
        .hero-glow-2 { position: absolute; width: 350px; height: 350px; border-radius: 50%; background: radial-gradient(circle, rgba(68, 130, 255, 0.18) 0%, transparent 70%); bottom: -60px; left: -70px; pointer-events: none; }
        .hero-content { position: relative; z-index: 2; text-align: center; color: #fff; }
        .hero-badge { display: inline-block; background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.22); padding: 0.4rem 1.2rem; border-radius: 2rem; font-size: 0.88rem; color: rgba(255, 255, 255, 0.9); margin-bottom: 1.5rem; letter-spacing: 0.04em; backdrop-filter: blur(6px); }
        .hero-badge i { color: var(--color-accent-glow); margin-right: 0.35rem; }
        .hero-title { font-size: 3rem; font-weight: 800; letter-spacing: 0.03em; line-height: 1.2; margin-bottom: 1.2rem; }
        .hero-title span { color: var(--color-accent-glow); }
        .hero-desc { font-size: 1.2rem; color: rgba(255, 255, 255, 0.8); max-width: 700px; margin: 0 auto 2rem; line-height: 1.7; }
        .hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
        .btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.85rem 2rem; border-radius: 2.5rem; font-weight: 700; font-size: 1rem; transition: all var(--transition-smooth); letter-spacing: 0.02em; }
        .btn-accent { background: var(--color-accent); color: #fff; box-shadow: 0 6px 24px rgba(232, 97, 60, 0.4); }
        .btn-accent:hover { background: var(--color-accent-dark); box-shadow: 0 10px 32px rgba(232, 97, 60, 0.5); transform: translateY(-3px); }
        .btn-white-outline { background: transparent; color: #fff; border: 2px solid rgba(255, 255, 255, 0.5); }
        .btn-white-outline:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; transform: translateY(-3px); }
        .hero-stats { display: flex; gap: 2.5rem; justify-content: center; margin-top: 3rem; flex-wrap: wrap; }
        .hero-stat { text-align: center; }
        .hero-stat-num { font-size: 2.2rem; font-weight: 800; color: #fff; }
        .hero-stat-label { font-size: 0.88rem; color: rgba(255, 255, 255, 0.7); margin-top: 0.25rem; }
        @media (max-width: 768px) {
            .hero-section { padding: 3.5rem 0 3rem; }
            .hero-title { font-size: 2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { gap: 1.5rem; }
            .hero-stat-num { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.6rem; }
            .hero-desc { font-size: 0.9rem; }
            .hero-stats { gap: 1rem; flex-direction: column; }
            .btn-primary { padding: 0.7rem 1.5rem; font-size: 0.9rem; }
        }

        /* Section */
        .section { padding: 4.5rem 0; }
        .section-header { text-align: center; margin-bottom: 3rem; }
        .section-label { display: inline-block; font-size: 0.85rem; font-weight: 700; color: var(--color-accent); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.6rem; }
        .section-title { font-size: 2.2rem; font-weight: 800; color: var(--color-primary); letter-spacing: 0.02em; }
        .section-subtitle { font-size: 1.05rem; color: var(--color-text-secondary); margin-top: 0.6rem; max-width: 620px; margin-left: auto; margin-right: auto; }
        @media (max-width: 768px) {
            .section { padding: 3rem 0; }
            .section-title { font-size: 1.7rem; }
            .section-header { margin-bottom: 2rem; }
        }

        /* Cards Grid */
        .cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(265px, 1fr)); gap: 1.5rem; }
        .card-tech { background: var(--color-card-bg); border-radius: var(--radius-2xl); padding: 2rem 1.6rem; border: 1px solid var(--color-card-border); transition: all var(--transition-smooth); position: relative; overflow: hidden; }
        .card-tech::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light)); transform: scaleX(0); transform-origin: left; transition: transform var(--transition-smooth); }
        .card-tech:hover { box-shadow: var(--shadow-card-hover); border-color: transparent; transform: translateY(-6px); }
        .card-tech:hover::before { transform: scaleX(1); }
        .card-tech-icon { width: 52px; height: 52px; border-radius: var(--radius-xl); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 1.2rem; }
        .card-tech-icon.blue { background: #eef3ff; color: #3b6df0; }
        .card-tech-icon.green { background: #e9f7f0; color: #2ecc71; }
        .card-tech-icon.orange { background: #fff4ef; color: #e8613c; }
        .card-tech-icon.purple { background: #f5f0ff; color: #7c3aed; }
        .card-tech h3 { font-size: 1.15rem; font-weight: 700; color: var(--color-primary); margin-bottom: 0.5rem; }
        .card-tech p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.65; }
        .card-tech-img { border-radius: var(--radius-xl); overflow: hidden; margin-bottom: 1.2rem; aspect-ratio: 16 / 10; }
        .card-tech-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .card-tech:hover .card-tech-img img { transform: scale(1.06); }

        /* Scene Cards */
        .scene-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.8rem; }
        .scene-card { background: #fff; border-radius: var(--radius-2xl); overflow: hidden; border: 1px solid var(--color-card-border); transition: all var(--transition-smooth); display: flex; flex-direction: column; }
        .scene-card:hover { box-shadow: var(--shadow-elevated); transform: translateY(-4px); }
        .scene-card-img { aspect-ratio: 16 / 9; overflow: hidden; }
        .scene-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .scene-card:hover .scene-card-img img { transform: scale(1.05); }
        .scene-card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .scene-card-body h3 { font-size: 1.1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 0.5rem; }
        .scene-card-body p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.6; flex: 1; }
        .scene-tag { display: inline-block; background: #f0f3fa; color: var(--color-brand-steel); padding: 0.25rem 0.75rem; border-radius: 1rem; font-size: 0.78rem; font-weight: 600; margin-top: 0.8rem; align-self: flex-start; }

        /* Process */
        .process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
        .process-step { text-align: center; position: relative; }
        .process-step-num { width: 58px; height: 58px; border-radius: 50%; background: var(--color-primary); color: #fff; font-size: 1.4rem; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem; position: relative; z-index: 2; }
        .process-step h4 { font-size: 1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 0.4rem; }
        .process-step p { font-size: 0.85rem; color: var(--color-text-secondary); }
        .process-connector { position: absolute; top: 29px; left: calc(50% + 40px); width: calc(100% - 80px); height: 2px; background: #dce2f0; z-index: 1; }
        .process-step:last-child .process-connector { display: none; }
        @media (max-width: 768px) {
            .process-steps { grid-template-columns: repeat(2, 1fr); gap: 2rem 1rem; }
            .process-connector { display: none; }
        }
        @media (max-width: 520px) {
            .process-steps { grid-template-columns: 1fr; }
        }

        /* Data Band */
        .data-band { background: var(--color-brand-deep); padding: 3.5rem 0; position: relative; overflow: hidden; }
        .data-band-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; opacity: 0.1; pointer-events: none; }
        .data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; position: relative; z-index: 2; text-align: center; }
        .data-item {}
        .data-num { font-size: 2.8rem; font-weight: 900; color: #fff; letter-spacing: 0.03em; }
        .data-num span { color: var(--color-accent-glow); }
        .data-label { font-size: 0.95rem; color: rgba(255, 255, 255, 0.72); margin-top: 0.3rem; }
        @media (max-width: 768px) {
            .data-grid { grid-template-columns: repeat(2, 1fr); gap: 1.8rem; }
            .data-num { font-size: 2rem; }
        }
        @media (max-width: 520px) {
            .data-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
            .data-num { font-size: 1.7rem; }
        }

        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.8rem; }
        .faq-item { background: #fff; border: 1px solid var(--color-card-border); border-radius: var(--radius-xl); overflow: hidden; transition: all var(--transition-base); }
        .faq-item:hover { border-color: #cdd4e8; }
        .faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 1.2rem 1.5rem; background: none; font-size: 1rem; font-weight: 600; color: var(--color-primary); text-align: left; gap: 1rem; transition: background var(--transition-base); }
        .faq-question:hover { background: #fafbfd; }
        .faq-question i { color: var(--color-accent); transition: transform var(--transition-base); font-size: 0.85rem; flex-shrink: 0; }
        .faq-answer { padding: 0 1.5rem 1.3rem; font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.7; display: none; }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-item.open { border-color: var(--color-accent); box-shadow: 0 0 0 4px rgba(232, 97, 60, 0.05); }

        /* CTA */
        .cta-section { background: linear-gradient(135deg, var(--color-brand-navy) 0%, var(--color-primary) 100%); padding: 4rem 0; text-align: center; position: relative; overflow: hidden; }
        .cta-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.14; pointer-events: none; }
        .cta-content { position: relative; z-index: 2; }
        .cta-title { font-size: 2rem; font-weight: 800; color: #fff; margin-bottom: 1rem; }
        .cta-desc { font-size: 1.05rem; color: rgba(255, 255, 255, 0.78); max-width: 560px; margin: 0 auto 2rem; }
        .cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
        @media (max-width: 520px) {
            .cta-title { font-size: 1.5rem; }
            .cta-desc { font-size: 0.9rem; }
        }

        /* Footer */
        .site-footer { background: #0d1127; color: rgba(255, 255, 255, 0.72); padding: 3.5rem 0 0; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; padding-bottom: 2.5rem; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
        .footer-brand h3 { color: #fff; font-size: 1.3rem; font-weight: 700; margin-bottom: 0.8rem; }
        .footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 340px; }
        .footer-links h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 0.8rem; }
        .footer-links ul { display: flex; flex-direction: column; gap: 0.45rem; }
        .footer-links a { font-size: 0.88rem; color: rgba(255, 255, 255, 0.6); transition: color var(--transition-base); }
        .footer-links a:hover { color: var(--color-accent-glow); }
        .footer-bottom { text-align: center; padding: 1.5rem 0; font-size: 0.82rem; color: rgba(255, 255, 255, 0.4); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
        }

        /* Utility */
        .bg-ice { background: #f6f8fd; }
        .text-accent { color: var(--color-accent); }

/* roulang page: category3 */
:root {
            --color-primary: #1a1f3c;
            --color-primary-light: #252b50;
            --color-accent: #f0a830;
            --color-accent-hover: #d49420;
            --color-accent-light: #fef6e8;
            --color-bg: #f8f9fc;
            --color-white: #ffffff;
            --color-text: #1e2235;
            --color-text-secondary: #5a6070;
            --color-text-muted: #8890a3;
            --color-border: #e2e6f0;
            --color-border-light: #eef1f7;
            --color-success: #10b981;
            --color-card-bg: #ffffff;
            --color-hero-overlay: rgba(15, 18, 36, 0.72);
            --shadow-sm: 0 1px 3px rgba(15, 18, 36, 0.06);
            --shadow-md: 0 4px 16px rgba(15, 18, 36, 0.10);
            --shadow-lg: 0 10px 40px rgba(15, 18, 36, 0.14);
            --shadow-xl: 0 20px 60px rgba(15, 18, 36, 0.18);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.40s ease;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1260px;
            --nav-height: 64px;
            --channels-height: 52px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-width: 320px;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 20px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
        }

        .header-logo:hover {
            color: var(--color-accent);
        }

        .header-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border-radius: var(--radius-full);
            padding: 8px 16px;
            gap: 8px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }

        .header-search:focus-within {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 4px rgba(240, 168, 48, 0.10);
            background: var(--color-white);
        }

        .header-search input {
            border: none;
            background: transparent;
            font-size: 0.9rem;
            color: var(--color-text);
            outline: none;
            width: 160px;
            font-family: inherit;
        }

        .header-search input::placeholder {
            color: var(--color-text-muted);
        }

        .header-search .search-icon {
            color: var(--color-text-muted);
            font-size: 0.9rem;
        }

        .btn-cta-header {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: all var(--transition-base);
            box-shadow: 0 2px 8px rgba(240, 168, 48, 0.30);
        }

        .btn-cta-header:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 6px 20px rgba(240, 168, 48, 0.40);
            transform: translateY(-1px);
        }

        /* 频道导航 */
        .nav-channels-wrap {
            background: var(--color-primary);
        }

        .nav-channels {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-channels::-webkit-scrollbar {
            display: none;
        }

        .nav-channels-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            height: var(--channels-height);
            white-space: nowrap;
            min-width: max-content;
        }

        .nav-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 18px;
            border-radius: var(--radius-full);
            color: rgba(255, 255, 255, 0.78);
            font-size: 0.88rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
            cursor: pointer;
            text-decoration: none;
        }

        .nav-channel-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.10);
        }

        .nav-channel-link.active {
            color: #fff;
            background: var(--color-accent);
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(240, 168, 48, 0.35);
        }

        .nav-channel-link i {
            font-size: 0.8rem;
            opacity: 0.85;
        }

        /* 移动端汉堡菜单 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 6px;
        }

        @media (max-width: 768px) {
            .header-search {
                display: none;
            }
            .btn-cta-header {
                font-size: 0.82rem;
                padding: 8px 14px;
            }
            .header-logo {
                font-size: 1.15rem;
            }
            .header-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
            .nav-channel-link {
                padding: 8px 13px;
                font-size: 0.8rem;
                gap: 4px;
            }
            .nav-channel-link i {
                font-size: 0.7rem;
            }
            .nav-channels-inner {
                gap: 2px;
                height: 46px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .header-top {
                height: 54px;
            }
            .header-logo {
                font-size: 1rem;
            }
            .header-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.8rem;
            }
            .btn-cta-header {
                font-size: 0.76rem;
                padding: 7px 12px;
                gap: 3px;
            }
            .nav-channel-link {
                padding: 7px 10px;
                font-size: 0.74rem;
            }
            .nav-channels-inner {
                height: 40px;
                gap: 1px;
            }
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: var(--color-primary) url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--color-hero-overlay);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(240, 168, 48, 0.20);
            color: var(--color-accent);
            border: 1px solid rgba(240, 168, 48, 0.35);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.84rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
        }

        .hero-title {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #fff;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-base);
            box-shadow: 0 6px 22px rgba(240, 168, 48, 0.40);
        }

        .btn-hero-primary:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 10px 30px rgba(240, 168, 48, 0.50);
            transform: translateY(-2px);
        }

        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.45);
            transition: all var(--transition-base);
        }

        .btn-hero-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 400px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
            .hero-content {
                padding: 40px 0;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                min-height: 340px;
            }
            .hero-title {
                font-size: 1.55rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                padding: 10px 18px;
                font-size: 0.84rem;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-badge {
                font-size: 0.74rem;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 70px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.55rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
            .section-header {
                margin-bottom: 34px;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 36px 0;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .section-desc {
                font-size: 0.88rem;
            }
        }

        /* ========== CARDS ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .card {
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

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

        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: #fff;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
        }

        .card-icon.accent {
            background: linear-gradient(135deg, var(--color-accent) 0%, #f5c260 100%);
        }

        .card-title {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .card-desc {
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        .card-image {
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .card-grid,
            .card-grid-4 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .card {
                padding: 24px 18px;
            }
            .card-image {
                height: 150px;
            }
        }

        /* ========== DARK BAND ========== */
        .band-dark {
            background: var(--color-primary);
            color: #fff;
        }

        .band-dark .section-title {
            color: #fff;
        }
        .band-dark .section-desc {
            color: rgba(255, 255, 255, 0.75);
        }
        .band-dark .section-label {
            color: var(--color-accent);
        }

        /* ========== STATS ROW ========== */
        .stats-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            text-align: center;
        }

        .stat-item .stat-number {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1;
            margin-bottom: 6px;
        }

        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
        }

        @media (max-width: 520px) {
            .stats-row {
                gap: 24px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
        }

        /* ========== PROCESS / TIMELINE ========== */
        .process-list {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
        }

        .process-step {
            flex: 1 1 220px;
            max-width: 280px;
            text-align: center;
            position: relative;
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }

        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .process-step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-accent);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .process-step h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }

        @media (max-width: 768px) {
            .process-step {
                flex: 1 1 160px;
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .process-list {
                flex-direction: column;
                align-items: center;
            }
            .process-step {
                max-width: 100%;
                width: 100%;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--color-border);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 22px;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-family: var(--font-body);
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--color-accent);
        }

        .faq-question .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--color-text-muted);
            transition: all var(--transition-base);
        }

        .faq-item.open .faq-toggle {
            background: var(--color-accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA BAND ========== */
        .cta-band {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::after {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(240, 168, 48, 0.12);
            top: -60px;
            right: -80px;
            pointer-events: none;
        }

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

        .cta-band h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .cta-band p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 26px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #fff;
            padding: 15px 34px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition-base);
            box-shadow: 0 8px 28px rgba(240, 168, 48, 0.45);
        }

        .btn-cta-large:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 12px 36px rgba(240, 168, 48, 0.55);
            transform: translateY(-2px);
        }

        @media (max-width: 520px) {
            .cta-band {
                padding: 40px 0;
            }
            .cta-band h2 {
                font-size: 1.4rem;
            }
            .cta-band p {
                font-size: 0.9rem;
            }
            .btn-cta-large {
                font-size: 0.9rem;
                padding: 13px 24px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== PARTNER TYPE CARDS ========== */
        .partner-type-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-align: left;
        }

        .partner-type-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }

        .partner-type-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .partner-type-body {
            padding: 22px 20px;
        }

        .partner-type-body h4 {
            font-family: var(--font-heading);
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .partner-type-body p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        .partner-type-badge {
            display: inline-block;
            background: var(--color-accent-light);
            color: var(--color-accent);
            font-size: 0.76rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            margin-bottom: 8px;
        }

        @media (max-width: 520px) {
            .partner-type-card img {
                height: 160px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #141828;
            color: rgba(255, 255, 255, 0.72);
            padding: 50px 0 30px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-brand h3 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-links h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .footer-links ul li {
            margin-bottom: 7px;
        }

        .footer-links ul li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.86rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-top: 18px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.40);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer {
                padding: 36px 0 22px;
            }
        }

        /* ========== ANIMATIONS ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(26px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-in-up {
            animation: fadeInUp 0.6s ease forwards;
        }

        .animate-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-delay-3 {
            animation-delay: 0.3s;
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #1a3c5e;
            --color-primary-light: #265780;
            --color-primary-dark: #0f2840;
            --color-accent: #e8831a;
            --color-accent-light: #f5a04c;
            --color-accent-dark: #c46e12;
            --color-surface: #f8fafb;
            --color-surface-alt: #edf2f7;
            --color-text-main: #1e293b;
            --color-text-soft: #5a6c7d;
            --color-text-muted: #8899aa;
            --color-border-soft: #dde4ed;
            --color-border-light: #eef2f7;
            --color-white: #ffffff;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 20px;
            --shadow-card: 0 2px 16px rgba(26, 60, 94, 0.07);
            --shadow-card-hover: 0 8px 32px rgba(26, 60, 94, 0.13);
            --shadow-nav: 0 1px 0 rgba(26, 60, 94, 0.06);
            --shadow-btn: 0 2px 8px rgba(232, 131, 26, 0.25);
            --shadow-btn-hover: 0 6px 20px rgba(232, 131, 26, 0.38);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
            --transition-bounce: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ========== 基础 Reset ========== */
        *,
        *::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: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--color-text-main);
            background-color: var(--color-white);
            min-height: 100vh;
            font-size: 16px;
            letter-spacing: 0.01em;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        /* ========== 容器 ========== */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 头部导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-nav);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }

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

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

        .header-logo i {
            color: var(--color-accent);
            font-size: 1.5rem;
        }

        .header-search-wrap {
            display: flex;
            align-items: center;
            gap: 0;
            background: var(--color-surface);
            border-radius: 28px;
            padding: 6px 6px 6px 16px;
            border: 1.5px solid var(--color-border-soft);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            flex: 0 1 360px;
        }

        .header-search-wrap:focus-within {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 4px rgba(232, 131, 26, 0.1);
        }

        .header-search-wrap input {
            border: none;
            background: transparent;
            outline: none;
            flex: 1;
            font-size: 0.925rem;
            color: var(--color-text-main);
            min-width: 0;
        }

        .header-search-wrap input::placeholder {
            color: var(--color-text-muted);
        }

        .header-search-btn {
            background: var(--color-accent);
            color: #fff;
            border-radius: 22px;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: background var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .header-search-btn:hover {
            background: var(--color-accent-dark);
            box-shadow: var(--shadow-btn);
        }

        .header-search-btn:focus-visible {
            outline: 3px solid var(--color-accent-light);
            outline-offset: 2px;
        }

        /* 频道 Tabs 双层导航第二行 */
        .nav-channels {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-channels::-webkit-scrollbar {
            display: none;
        }

        .nav-channels-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 0;
            white-space: nowrap;
            flex-wrap: nowrap;
        }

        .nav-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 18px;
            border-radius: 24px;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--color-text-soft);
            transition: all var(--transition-smooth);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .nav-channel-link i {
            font-size: 0.9rem;
            opacity: 0.75;
            transition: opacity var(--transition-fast);
        }

        .nav-channel-link:hover {
            color: var(--color-primary);
            background: rgba(26, 60, 94, 0.05);
        }

        .nav-channel-link:hover i {
            opacity: 1;
        }

        .nav-channel-link.active {
            color: var(--color-white);
            background: var(--color-primary);
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(26, 60, 94, 0.25);
        }

        .nav-channel-link.active i {
            opacity: 1;
            color: var(--color-accent-light);
        }

        .nav-channel-link:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: -2px;
        }

        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
                gap: 12px;
                padding: 10px 0;
            }

            .header-logo {
                font-size: 1.15rem;
            }

            .header-search-wrap {
                flex: 1 1 100%;
                order: 1;
                min-width: 0;
            }

            .nav-channel-link {
                padding: 8px 14px;
                font-size: 0.85rem;
                gap: 5px;
            }

            .nav-channel-link i {
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .nav-channel-link {
                padding: 7px 11px;
                font-size: 0.8rem;
                border-radius: 20px;
            }

            .header-logo {
                font-size: 1.05rem;
                gap: 6px;
            }

            .header-logo i {
                font-size: 1.2rem;
            }
        }

        /* ========== 按钮系统 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-btn);
            transition: all var(--transition-bounce);
            text-align: center;
            letter-spacing: 0.015em;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            border: 2px solid var(--color-accent);
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-btn);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }

        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 60, 94, 0.2);
            transform: translateY(-2px);
        }

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

        .btn-light {
            background: #fff;
            color: var(--color-primary);
            border: 2px solid #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
        }

        .btn-light:hover {
            background: var(--color-surface);
            border-color: var(--color-surface);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14);
            transform: translateY(-2px);
        }

        .btn:focus-visible {
            outline: 3px solid var(--color-accent-light);
            outline-offset: 3px;
        }

        @media (max-width: 520px) {
            .btn {
                padding: 11px 20px;
                font-size: 0.9rem;
                gap: 6px;
            }
        }

        /* ========== 标签/徽章 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: var(--radius-tag);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .badge-accent {
            background: rgba(232, 131, 26, 0.12);
            color: var(--color-accent-dark);
        }

        .badge-primary {
            background: rgba(26, 60, 94, 0.08);
            color: var(--color-primary);
        }

        .badge-success {
            background: rgba(34, 170, 85, 0.1);
            color: #1a7a3a;
        }

        /* ========== 板块通用间距 ========== */
        .section {
            padding: 72px 0;
        }

        .section-alt {
            background: var(--color-surface);
        }

        .section-dark {
            background: var(--color-primary);
            color: #fff;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--color-text-soft);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.78);
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

            .section-header {
                margin-bottom: 32px;
            }

            .section-header h2 {
                font-size: 1.6rem;
            }

            .section-header p {
                font-size: 0.95rem;
            }
        }

        /* ========== 卡片系统 ========== */
        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            transition: all var(--transition-bounce);
            border: 1px solid var(--color-border-light);
            height: 100%;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-border-soft);
        }

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .card-icon.orange {
            background: rgba(232, 131, 26, 0.12);
            color: var(--color-accent);
        }

        .card-icon.blue {
            background: rgba(26, 60, 94, 0.1);
            color: var(--color-primary);
        }

        .card-icon.teal {
            background: rgba(20, 160, 160, 0.1);
            color: #149090;
        }

        .card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 8px;
            letter-spacing: 0.01em;
        }

        .card p {
            font-size: 0.925rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        /* 图文卡片 */
        .card-image-top {
            overflow: hidden;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            aspect-ratio: 16 / 10;
            background: var(--color-surface-alt);
        }

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

        .card-with-image:hover .card-image-top img {
            transform: scale(1.04);
        }

        .card-with-image {
            padding: 0;
            overflow: hidden;
        }

        .card-with-image .card-body {
            padding: 22px 20px 24px;
        }

        /* ========== 数据统计块 ========== */
        .stat-item {
            text-align: center;
            padding: 20px;
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-accent);
            letter-spacing: 0.03em;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            margin-top: 6px;
            font-weight: 500;
        }

        .section-dark .stat-number {
            color: var(--color-accent-light);
        }

        .section-dark .stat-label {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ========== FAQ 样式 ========== */
        .faq-item {
            border-bottom: 1px solid var(--color-border-light);
            padding: 20px 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--color-border-light);
        }

        .faq-question {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-text-main);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
        }

        .faq-item:hover .faq-question {
            color: var(--color-primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-surface-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--color-text-soft);
            transition: all var(--transition-smooth);
        }

        .faq-item:hover .faq-icon {
            background: var(--color-accent);
            color: #fff;
        }

        .faq-answer {
            margin-top: 12px;
            font-size: 0.925rem;
            color: var(--color-text-soft);
            line-height: 1.7;
            padding-left: 0;
            max-width: 680px;
        }

        /* ========== CTA 区域 ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.025);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.02em;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
            line-height: 1.6;
        }

        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0f1f30;
            color: rgba(255, 255, 255, 0.75);
            padding: 52px 0 0;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.85rem;
            line-height: 1.6;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

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

        .footer-links ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
            font-size: 0.85rem;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 18px 0;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ========== Hero 区域 ========== */
        .hero-category {
            position: relative;
            padding: 80px 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 40, 64, 0.88) 0%, rgba(26, 60, 94, 0.78) 40%, rgba(15, 40, 64, 0.85) 100%);
            z-index: 1;
        }

        .hero-category-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }

        .hero-category-content h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.03em;
            line-height: 1.3;
        }

        .hero-category-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .hero-category-content .btn-row {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        @media (max-width: 768px) {
            .hero-category {
                padding: 52px 0;
            }

            .hero-category-content h1 {
                font-size: 1.8rem;
            }

            .hero-category-content p {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .hero-category-content h1 {
                font-size: 1.5rem;
            }

            .hero-category-content .btn-row {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ========== 流程步骤 ========== */
        .process-step {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 20px 0;
            position: relative;
        }

        .process-step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: 0 3px 12px rgba(26, 60, 94, 0.2);
        }

        .process-step-content h4 {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-text-main);
            margin-bottom: 4px;
        }

        .process-step-content p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        .process-connector {
            width: 2px;
            height: 28px;
            background: var(--color-border-soft);
            margin-left: 23px;
        }

        /* ========== 图片遮罩与 Hover ========== */
        .img-hover-zoom {
            overflow: hidden;
            border-radius: var(--radius-card);
        }

        .img-hover-zoom img {
            transition: transform 0.45s ease;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .img-hover-zoom:hover img {
            transform: scale(1.06);
        }

        /* ========== 响应式网格补充 ========== */
        @media (max-width: 1024px) {
            .grid-4col {
                grid-template-columns: repeat(2, 1fr) !important;
            }
        }

        @media (max-width: 520px) {
            .grid-4col {
                grid-template-columns: 1fr !important;
            }

            .grid-3col {
                grid-template-columns: 1fr !important;
            }

            .grid-2col {
                grid-template-columns: 1fr !important;
            }
        }