/* roulang page: index */
:root{
            --bg-primary:#0B0F19;
            --bg-secondary:#131A2A;
            --primary:#3B82F6;
            --secondary:#22D3EE;
            --text-primary:#F0F4FF;
            --text-secondary:#94A3B8;
            --text-muted:#64748B;
            --card-bg:rgba(255,255,255,0.05);
            --card-border:rgba(255,255,255,0.10);
            --gradient-main:linear-gradient(135deg,#3B82F6 0%,#22D3EE 100%);
            --glow-blue:rgba(59,130,246,0.5);
            --glow-cyan:rgba(34,211,238,0.4);
            --success:#10B981;
            --warning:#F59E0B;
            --radius-card:16px;
            --radius-btn:12px;
            --shadow-card:0 8px 30px rgba(0,0,0,0.3);
            --shadow-hover:0 12px 40px rgba(0,0,0,0.45),0 0 24px rgba(59,130,246,0.15);
            --shadow-btn:0 4px 20px rgba(59,130,246,0.45);
            --font-base:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
            --section-pad:88px 0;
            --nav-h:70px;
        }
        *,
        *::before,
        *::after{
            box-sizing:border-box;
        }
        html{
            scroll-behavior:smooth;
        }
        body{
            font-family:var(--font-base);
            background-color:var(--bg-primary);
            color:var(--text-primary);
            line-height:1.75;
            font-size:16px;
            margin:0;
        }
        a{
            color:var(--secondary);
            text-decoration:none;
            transition:color .25s ease;
        }
        a:hover{
            color:#fff;
        }
        img{
            max-width:100%;
            display:block;
        }
        button,
        input{
            font-family:inherit;
        }
        h1,h2,h3,h4,h5,h6{
            font-weight:700;
            color:var(--text-primary);
            line-height:1.3;
        }
        .container{
            max-width:1320px;
        }
        .section-block{
            padding:var(--section-pad);
        }
        .section-sub{
            background:var(--bg-secondary);
        }
        .section-head{
            margin-bottom:36px;
        }
        .section-head .section-title{
            font-size:1.9rem;
            font-weight:700;
            position:relative;
            padding-left:16px;
            margin-bottom:8px;
        }
        .section-head .section-title::before{
            content:'';
            position:absolute;
            left:0;
            top:6px;
            bottom:6px;
            width:4px;
            border-radius:4px;
            background:var(--gradient-main);
        }
        .section-head .section-desc{
            color:var(--text-secondary);
            font-size:14px;
            max-width:640px;
        }
        .section-more{
            font-size:14px;
            color:var(--text-secondary);
            border-bottom:1px solid transparent;
            transition:color .25s,border-color .25s;
        }
        .section-more:hover{
            color:var(--secondary);
            border-color:var(--secondary);
        }
        /* ========== Navbar ========== */
        .site-header{
            position:fixed;
            top:0;
            left:0;
            right:0;
            z-index:1000;
            height:var(--nav-h);
            transition:background .35s ease,backdrop-filter .35s ease,border-color .35s ease,box-shadow .35s ease;
            background:transparent;
            border-bottom:1px solid transparent;
        }
        .site-header.scrolled{
            background:rgba(11,15,25,0.85);
            backdrop-filter:blur(18px);
            -webkit-backdrop-filter:blur(18px);
            border-bottom:1px solid rgba(255,255,255,0.06);
            box-shadow:0 4px 30px rgba(0,0,0,0.35);
        }
        .site-header .navbar{
            height:var(--nav-h);
            padding:0;
        }
        .site-header .navbar-brand{
            display:flex;
            align-items:center;
            font-weight:800;
            font-size:1.35rem;
            color:var(--text-primary);
            gap:10px;
        }
        .site-header .brand-logo{
            width:36px;
            height:36px;
            border-radius:10px;
            background:var(--gradient-main);
            display:flex;
            align-items:center;
            justify-content:center;
            box-shadow:0 0 16px rgba(59,130,246,0.4);
            flex-shrink:0;
        }
        .site-header .brand-logo svg{
            width:20px;
            height:20px;
            fill:#fff;
        }
        .site-header .navbar-nav{
            gap:6px;
            margin-left:30px;
        }
        .site-header .nav-link{
            color:var(--text-secondary);
            font-weight:500;
            font-size:15px;
            padding:8px 16px !important;
            border-radius:8px;
            position:relative;
            transition:color .25s,background .25s;
        }
        .site-header .nav-link::after{
            content:'';
            position:absolute;
            bottom:2px;
            left:16px;
            right:16px;
            height:2px;
            background:var(--gradient-main);
            border-radius:2px;
            opacity:0;
            transform:scaleX(0.4);
            transition:opacity .25s,transform .25s;
        }
        .site-header .nav-link:hover,
        .site-header .nav-link.active{
            color:#fff;
        }
        .site-header .nav-link:hover::after,
        .site-header .nav-link.active::after{
            opacity:1;
            transform:scaleX(1);
        }
        .nav-actions{
            display:flex;
            align-items:center;
            gap:12px;
            margin-left:30px;
        }
        .btn{
            border-radius:var(--radius-btn);
            font-weight:600;
            font-size:14px;
            transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,color .25s ease;
        }
        .btn:focus,
        .btn:focus-visible{
            outline:2px solid var(--secondary);
            outline-offset:2px;
            box-shadow:none;
        }
        .btn-gradient{
            background:var(--gradient-main);
            border:none;
            color:#fff;
            padding:10px 24px;
            box-shadow:var(--shadow-btn);
        }
        .btn-gradient:hover{
            transform:translateY(-2px);
            box-shadow:0 6px 28px rgba(59,130,246,0.55);
            color:#fff;
        }
        .btn-ghost{
            background:rgba(255,255,255,0.05);
            border:1px solid rgba(255,255,255,0.14);
            color:var(--text-primary);
            padding:10px 24px;
            backdrop-filter:blur(8px);
        }
        .btn-ghost:hover{
            background:rgba(255,255,255,0.12);
            border-color:var(--secondary);
            color:var(--secondary);
        }
        .btn-outline-light{
            border:1px solid rgba(255,255,255,0.22);
            color:var(--text-secondary);
            background:transparent;
            padding:8px 18px;
            border-radius:var(--radius-btn);
        }
        .btn-outline-light:hover{
            border-color:var(--secondary);
            color:var(--secondary);
            background:rgba(34,211,238,0.08);
        }
        .navbar-toggler{
            border:none;
            background:transparent;
            padding:0;
        }
        .navbar-toggler:focus{
            box-shadow:none;
        }
        .navbar-toggler .toggler-icon{
            display:block;
            width:24px;
            height:2px;
            background:var(--text-primary);
            margin:6px 0;
            border-radius:2px;
            transition:transform .3s,opacity .3s;
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(1){
            transform:translateY(8px) rotate(45deg);
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(2){
            opacity:0;
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(3){
            transform:translateY(-8px) rotate(-45deg);
        }
        @media (max-width:991.98px){
            .site-header .navbar-collapse{
                background:rgba(11,15,25,0.97);
                backdrop-filter:blur(20px);
                border-radius:16px;
                border:1px solid rgba(255,255,255,0.08);
                padding:20px;
                margin-top:14px;
                box-shadow:0 20px 60px rgba(0,0,0,0.6);
            }
            .site-header .navbar-nav{
                margin-left:0;
                gap:4px;
            }
            .site-header .nav-link{
                padding:12px 16px !important;
                border-radius:10px;
            }
            .site-header .nav-link:hover,
            .site-header .nav-link.active{
                background:rgba(59,130,246,0.15);
            }
            .nav-actions{
                margin-left:0;
                margin-top:14px;
                padding-top:14px;
                border-top:1px solid rgba(255,255,255,0.08);
                display:flex;
                gap:12px;
            }
            .nav-actions .btn{
                flex:1;
                text-align:center;
            }
        }
        /* ========== Hero ========== */
        .hero{
            min-height:100vh;
            display:flex;
            align-items:center;
            position:relative;
            background:url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            overflow:hidden;
            padding:120px 0 80px;
        }
        .hero::before{
            content:'';
            position:absolute;
            inset:0;
            background:linear-gradient(135deg,rgba(11,15,25,0.35) 0%,rgba(11,15,25,0.6) 50%,rgba(11,15,25,0.92) 100%);
        }
        .hero::after{
            content:'';
            position:absolute;
            bottom:0;
            left:0;
            right:0;
            height:180px;
            background:linear-gradient(to top,rgba(11,15,25,0.95),transparent);
        }
        .hero-content{
            position:relative;
            z-index:2;
            max-width:760px;
        }
        .hero-eyebrow{
            display:inline-flex;
            align-items:center;
            gap:8px;
            background:rgba(255,255,255,0.08);
            border:1px solid rgba(255,255,255,0.14);
            border-radius:999px;
            padding:6px 18px;
            font-size:13px;
            color:var(--secondary);
            margin-bottom:24px;
            backdrop-filter:blur(8px);
        }
        .hero-eyebrow i{
            font-size:16px;
        }
        .hero h1{
            font-size:clamp(2.4rem,6vw,4.2rem);
            font-weight:800;
            line-height:1.15;
            margin-bottom:20px;
            letter-spacing:-0.5px;
        }
        .hero .gradient-text{
            background:var(--gradient-main);
            -webkit-background-clip:text;
            background-clip:text;
            -webkit-text-fill-color:transparent;
            color:transparent;
        }
        .hero-sub{
            font-size:17px;
            color:var(--text-secondary);
            max-width:600px;
            margin-bottom:32px;
            line-height:1.8;
            text-align:justify;
            hyphens:auto;
        }
        .hero-actions{
            display:flex;
            gap:16px;
            flex-wrap:wrap;
            margin-bottom:48px;
        }
        .hero-actions .btn{
            padding:14px 32px;
            font-size:15px;
        }
        .hero-stats{
            display:flex;
            gap:40px;
            flex-wrap:wrap;
            border-top:1px solid rgba(255,255,255,0.1);
            padding-top:32px;
        }
        .hero-stats .stat-item{
            display:flex;
            flex-direction:column;
        }
        .hero-stats .stat-item strong{
            font-size:2rem;
            font-weight:800;
            background:var(--gradient-main);
            -webkit-background-clip:text;
            background-clip:text;
            -webkit-text-fill-color:transparent;
            color:transparent;
        }
        .hero-stats .stat-item span{
            font-size:13px;
            color:var(--text-muted);
            margin-top:4px;
        }
        .scroll-indicator{
            position:absolute;
            bottom:32px;
            left:50%;
            transform:translateX(-50%);
            z-index:2;
            width:36px;
            height:36px;
            border-radius:50%;
            border:1px solid rgba(255,255,255,0.2);
            display:flex;
            align-items:center;
            justify-content:center;
            color:var(--text-secondary);
            animation:bounceDown 2s infinite;
            cursor:pointer;
        }
        .scroll-indicator i{
            font-size:18px;
        }
        @keyframes bounceDown{
            0%,100%{transform:translateX(-50%) translateY(0);opacity:0.8;}
            50%{transform:translateX(-50%) translateY(8px);opacity:0.4;}
        }
        @media (max-width:991.98px){
            .hero{
                min-height:80vh;
                padding:100px 0 60px;
            }
            .hero-stats{
                gap:24px;
            }
        }
        @media (max-width:575.98px){
            .hero{
                min-height:75vh;
            }
            .hero-actions{
                flex-direction:column;
            }
            .hero-actions .btn{
                width:100%;
                text-align:center;
            }
            .hero-stats{
                gap:18px;
            }
            .hero-stats .stat-item strong{
                font-size:1.5rem;
            }
        }
        /* ========== News / CMS Track ========== */
        .news-section{
            padding:var(--section-pad);
            background:var(--bg-primary);
        }
        .news-head{
            display:flex;
            align-items:flex-end;
            justify-content:space-between;
            margin-bottom:36px;
            flex-wrap:wrap;
            gap:16px;
        }
        .news-track{
            display:flex;
            overflow-x:auto;
            gap:24px;
            scroll-snap-type:x mandatory;
            padding-bottom:16px;
            scrollbar-width:none;
            -ms-overflow-style:none;
        }
        .news-track::-webkit-scrollbar{
            display:none;
        }
        .news-card{
            flex:0 0 380px;
            scroll-snap-align:start;
            background:var(--card-bg);
            border:1px solid var(--card-border);
            border-radius:var(--radius-card);
            overflow:hidden;
            backdrop-filter:blur(16px);
            -webkit-backdrop-filter:blur(16px);
            transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
        }
        .news-card:hover{
            transform:translateY(-6px);
            border-color:rgba(59,130,246,0.6);
            box-shadow:var(--shadow-hover);
        }
        .news-card-link{
            display:block;
            color:inherit;
            text-decoration:none;
            height:100%;
        }
        .news-thumb{
            position:relative;
            height:180px;
            overflow:hidden;
        }
        .news-thumb img{
            width:100%;
            height:100%;
            object-fit:cover;
            transition:transform .5s ease;
        }
        .news-card:hover .news-thumb img{
            transform:scale(1.05);
        }
        .cat-badge{
            position:absolute;
            top:14px;
            left:14px;
            background:var(--gradient-main);
            color:#fff;
            font-size:12px;
            font-weight:600;
            padding:4px 14px;
            border-radius:999px;
            box-shadow:0 4px 12px rgba(59,130,246,0.4);
            z-index:2;
        }
        .news-body{
            padding:20px;
        }
        .news-body h3{
            font-size:1.1rem;
            font-weight:600;
            margin-bottom:10px;
            display:-webkit-box;
            -webkit-line-clamp:2;
            -webkit-box-orient:vertical;
            overflow:hidden;
            line-height:1.5;
        }
        .news-body p{
            font-size:14px;
            color:var(--text-secondary);
            display:-webkit-box;
            -webkit-line-clamp:2;
            -webkit-box-orient:vertical;
            overflow:hidden;
            margin-bottom:14px;
            line-height:1.6;
        }
        .news-date{
            font-size:13px;
            color:var(--text-muted);
            display:flex;
            align-items:center;
            gap:6px;
        }
        .news-date i{
            font-size:14px;
        }
        .empty-state{
            flex:0 0 100%;
            min-height:220px;
            display:flex;
            flex-direction:column;
            align-items:center;
            justify-content:center;
            background:var(--card-bg);
            border:1px dashed rgba(255,255,255,0.14);
            border-radius:var(--radius-card);
            color:var(--text-muted);
            font-size:15px;
            gap:12px;
        }
        .empty-state i{
            font-size:42px;
            opacity:0.5;
        }
        @media (max-width:575.98px){
            .news-card{
                flex:0 0 85vw;
            }
        }
        /* ========== Hot Products ========== */
        .hot-section{
            padding:var(--section-pad);
            background:var(--bg-secondary);
        }
        .hot-grid{
            display:grid;
            grid-template-columns:repeat(4,1fr);
            gap:24px;
        }
        .hot-card{
            background:var(--card-bg);
            border:1px solid var(--card-border);
            border-radius:var(--radius-card);
            overflow:hidden;
            backdrop-filter:blur(16px);
            -webkit-backdrop-filter:blur(16px);
            transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
            position:relative;
        }
        .hot-card:hover{
            transform:translateY(-8px);
            border-color:rgba(59,130,246,0.6);
            box-shadow:var(--shadow-hover);
        }
        .hot-thumb{
            height:180px;
            overflow:hidden;
            position:relative;
        }
        .hot-thumb img{
            width:100%;
            height:100%;
            object-fit:cover;
            transition:transform .5s ease;
        }
        .hot-card:hover .hot-thumb img{
            transform:scale(1.06);
        }
        .hot-badge{
            position:absolute;
            top:14px;
            left:14px;
            background:linear-gradient(135deg,#F59E0B,#F97316);
            color:#fff;
            font-size:12px;
            font-weight:700;
            padding:4px 12px;
            border-radius:8px;
            box-shadow:0 4px 14px rgba(245,158,11,0.4);
            z-index:2;
        }
        .hot-body{
            padding:22px;
        }
        .hot-body h3{
            font-size:1.15rem;
            font-weight:600;
            margin-bottom:8px;
        }
        .hot-body p{
            font-size:14px;
            color:var(--text-secondary);
            line-height:1.6;
            margin-bottom:16px;
        }
        .hot-link{
            font-size:14px;
            font-weight:600;
            color:var(--secondary);
            display:inline-flex;
            align-items:center;
            gap:6px;
            transition:gap .25s;
        }
        .hot-link:hover{
            gap:10px;
            color:#fff;
        }
        @media (max-width:1199.98px){
            .hot-grid{
                grid-template-columns:repeat(2,1fr);
            }
        }
        @media (max-width:575.98px){
            .hot-grid{
                grid-template-columns:1fr;
            }
        }
        /* ========== Featured Collections ========== */
        .collection-block{
            padding:var(--section-pad);
            background:var(--bg-primary);
        }
        .collection-block+.collection-block{
            border-top:1px solid rgba(255,255,255,0.04);
        }
        .collection-block:nth-child(even){
            background:var(--bg-secondary);
        }
        .collection-head{
            display:flex;
            align-items:flex-end;
            justify-content:space-between;
            margin-bottom:32px;
            flex-wrap:wrap;
            gap:12px;
        }
        .collection-head .section-title{
            margin:0;
        }
        .collection-grid{
            display:grid;
            grid-template-columns:2fr 1fr;
            gap:24px;
        }
        .feature-card{
            position:relative;
            border-radius:var(--radius-card);
            overflow:hidden;
            min-height:300px;
            display:block;
            text-decoration:none;
            border:1px solid var(--card-border);
            background:var(--card-bg);
        }
        .feature-card img{
            width:100%;
            height:100%;
            min-height:300px;
            object-fit:cover;
            position:absolute;
            inset:0;
            transition:transform .6s ease;
        }
        .feature-card:hover img{
            transform:scale(1.05);
        }
        .feature-overlay{
            position:absolute;
            inset:0;
            background:linear-gradient(to top,rgba(11,15,25,0.95) 0%,rgba(11,15,25,0.3) 60%,rgba(11,15,25,0.1) 100%);
            display:flex;
            flex-direction:column;
            justify-content:flex-end;
            padding:28px;
        }
        .feature-overlay .badge{
            background:var(--gradient-main);
            border-radius:999px;
            padding:5px 14px;
            font-weight:600;
            font-size:12px;
            width:fit-content;
            margin-bottom:12px;
        }
        .feature-overlay h3{
            font-size:1.5rem;
            font-weight:700;
            margin-bottom:6px;
            color:#fff;
        }
        .feature-overlay p{
            font-size:14px;
            color:var(--text-secondary);
            margin:0;
            max-width:400px;
            line-height:1.6;
        }
        .mini-list{
            display:flex;
            flex-direction:column;
            gap:16px;
        }
        .mini-card{
            background:var(--card-bg);
            border:1px solid var(--card-border);
            border-radius:var(--radius-card);
            padding:16px;
            display:flex;
            gap:14px;
            align-items:center;
            transition:border-color .3s,box-shadow .3s,transform .3s;
            text-decoration:none;
            color:inherit;
            flex:1;
        }
        .mini-card:hover{
            border-color:rgba(59,130,246,0.5);
            box-shadow:var(--shadow-hover);
            transform:translateX(4px);
            color:inherit;
        }
        .mini-card img{
            width:80px;
            height:80px;
            object-fit:cover;
            border-radius:12px;
            flex-shrink:0;
        }
        .mini-info{
            flex:1;
            min-width:0;
        }
        .mini-info h4{
            font-size:0.95rem;
            font-weight:600;
            margin-bottom:4px;
            white-space:nowrap;
            overflow:hidden;
            text-overflow:ellipsis;
        }
        .mini-info p{
            font-size:13px;
            color:var(--text-secondary);
            margin-bottom:4px;
            line-height:1.4;
            display:-webkit-box;
            -webkit-line-clamp:2;
            -webkit-box-orient:vertical;
            overflow:hidden;
        }
        .mini-info span{
            font-size:12px;
            color:var(--secondary);
            font-weight:600;
        }
        @media (max-width:991.98px){
            .collection-grid{
                grid-template-columns:1fr;
            }
            .mini-list{
                flex-direction:row;
                flex-wrap:wrap;
            }
            .mini-card{
                flex:0 0 calc(50% - 8px);
            }
        }
        @media (max-width:575.98px){
            .mini-card{
                flex:0 0 100%;
            }
        }
        /* ========== Advantages ========== */
        .adv-section{
            padding:var(--section-pad);
            background:var(--bg-secondary);
        }
        .adv-grid{
            display:grid;
            grid-template-columns:repeat(4,1fr);
            gap:24px;
        }
        .adv-card{
            background:var(--card-bg);
            border:1px solid var(--card-border);
            border-radius:var(--radius-card);
            padding:36px 28px;
            backdrop-filter:blur(16px);
            -webkit-backdrop-filter:blur(16px);
            transition:transform .3s,border-color .3s,box-shadow .3s;
            position:relative;
            overflow:hidden;
        }
        .adv-card::before{
            content:'';
            position:absolute;
            top:0;
            left:0;
            right:0;
            height:3px;
            background:var(--gradient-main);
            opacity:0;
            transition:opacity .3s;
        }
        .adv-card:hover{
            transform:translateY(-6px);
            border-color:rgba(59,130,246,0.4);
            box-shadow:var(--shadow-hover);
        }
        .adv-card:hover::before{
            opacity:1;
        }
        .adv-icon{
            width:56px;
            height:56px;
            border-radius:14px;
            background:var(--gradient-main);
            display:flex;
            align-items:center;
            justify-content:center;
            font-size:24px;
            color:#fff;
            margin-bottom:20px;
            box-shadow:0 8px 20px rgba(59,130,246,0.35);
        }
        .adv-card h3{
            font-size:1.15rem;
            font-weight:600;
            margin-bottom:10px;
        }
        .adv-card p{
            font-size:14px;
            color:var(--text-secondary);
            line-height:1.6;
            margin:0;
        }
        @media (max-width:1199.98px){
            .adv-grid{
                grid-template-columns:repeat(2,1fr);
            }
        }
        @media (max-width:575.98px){
            .adv-grid{
                grid-template-columns:1fr;
            }
        }
        /* ========== FAQ ========== */
        .faq-section{
            padding:var(--section-pad);
            background:var(--bg-primary);
        }
        .faq-wrap{
            max-width:820px;
            margin:0 auto;
        }
        .accordion{
            --bs-accordion-bg:transparent;
            --bs-accordion-border-width:0;
            --bs-accordion-btn-bg:transparent;
            --bs-accordion-active-bg:transparent;
            --bs-accordion-btn-color:var(--text-primary);
            --bs-accordion-active-color:var(--text-primary);
            --bs-accordion-body-padding:0 24px 24px;
        }
        .accordion-item{
            background:var(--card-bg);
            border:1px solid var(--card-border);
            border-radius:14px;
            margin-bottom:14px;
            overflow:hidden;
            backdrop-filter:blur(16px);
            -webkit-backdrop-filter:blur(16px);
            transition:border-color .3s;
        }
        .accordion-item:has(.accordion-button:not(.collapsed)){
            border-color:rgba(59,130,246,0.5);
        }
        .accordion-button{
            background:transparent;
            font-weight:600;
            font-size:16px;
            color:var(--text-primary);
            padding:20px 24px;
            box-shadow:none !important;
            border-radius:14px !important;
            transition:color .3s;
        }
        .accordion-button::after{
            background-image:none;
            content:'\F282';
            font-family:'bootstrap-icons';
            font-size:18px;
            color:var(--secondary);
            transition:transform .3s;
        }
        .accordion-button:not(.collapsed)::after{
            transform:rotate(180deg);
        }
        .accordion-button:not(.collapsed){
            color:var(--secondary);
        }
        .accordion-button:hover{
            color:var(--secondary);
        }
        .accordion-body{
            color:var(--text-secondary);
            font-size:14px;
            line-height:1.75;
            padding-top:0;
        }
        .accordion-body p{
            margin-bottom:0;
        }
        /* ========== CTA Banner ========== */
        .cta-section{
            padding:120px 0;
            position:relative;
            background:var(--bg-secondary);
            overflow:hidden;
        }
        .cta-section::before{
            content:'';
            position:absolute;
            inset:0;
            background:
                linear-gradient(rgba(34,211,238,0.03) 1px,transparent 1px),
                linear-gradient(90deg,rgba(34,211,238,0.03) 1px,transparent 1px);
            background-size:40px 40px;
        }
        .cta-section::after{
            content:'';
            position:absolute;
            top:50%;
            left:50%;
            transform:translate(-50%,-50%);
            width:600px;
            height:600px;
            background:radial-gradient(ellipse,rgba(59,130,246,0.15),transparent 70%);
            pointer-events:none;
        }
        .cta-inner{
            position:relative;
            z-index:2;
            text-align:center;
            max-width:720px;
            margin:0 auto;
        }
        .cta-inner h2{
            font-size:clamp(1.8rem,3.8vw,2.8rem);
            font-weight:800;
            margin-bottom:16px;
        }
        .cta-inner p{
            color:var(--text-secondary);
            font-size:16px;
            line-height:1.7;
            margin-bottom:36px;
        }
        .cta-inner .btn{
            padding:15px 42px;
            font-size:16px;
        }
        /* ========== Footer ========== */
        .site-footer{
            background:var(--bg-primary);
            position:relative;
            padding-top:80px;
        }
        .site-footer::before{
            content:'';
            position:absolute;
            top:0;
            left:0;
            right:0;
            height:2px;
            background:var(--gradient-main);
        }
        .footer-grid{
            display:grid;
            grid-template-columns:1.5fr 1fr 1fr 1.2fr;
            gap:40px;
            padding-bottom:48px;
        }
        .footer-brand{
            display:flex;
            align-items:center;
            gap:10px;
            font-size:1.3rem;
            font-weight:800;
            color:var(--text-primary);
            margin-bottom:16px;
        }
        .footer-brand .brand-logo{
            width:34px;
            height:34px;
            border-radius:10px;
            background:var(--gradient-main);
            display:flex;
            align-items:center;
            justify-content:center;
            flex-shrink:0;
        }
        .footer-brand .brand-logo svg{
            width:18px;
            height:18px;
            fill:#fff;
        }
        .footer-about p{
            font-size:14px;
            color:var(--text-secondary);
            line-height:1.7;
            max-width:300px;
        }
        .footer-col h4{
            font-size:15px;
            font-weight:700;
            margin-bottom:18px;
            color:var(--text-primary);
        }
        .footer-col ul{
            list-style:none;
            padding:0;
            margin:0;
        }
        .footer-col ul li{
            margin-bottom:10px;
        }
        .footer-col ul a{
            color:var(--text-secondary);
            font-size:14px;
            transition:color .25s,padding-left .25s;
        }
        .footer-col ul a:hover{
            color:var(--secondary);
            padding-left:4px;
        }
        .footer-contact li{
            display:flex;
            align-items:flex-start;
            gap:10px;
            color:var(--text-secondary);
            font-size:14px;
            margin-bottom:14px;
            line-height:1.6;
        }
        .footer-contact i{
            color:var(--secondary);
            font-size:16px;
            margin-top:3px;
            flex-shrink:0;
        }
        .footer-bottom{
            border-top:1px solid rgba(255,255,255,0.06);
            padding:24px 0;
            text-align:center;
            font-size:13px;
            color:var(--text-muted);
        }
        @media (max-width:991.98px){
            .footer-grid{
                grid-template-columns:1fr 1fr;
            }
        }
        @media (max-width:575.98px){
            .footer-grid{
                grid-template-columns:1fr;
            }
        }
        /* ========== Utility ========== */
        .section-label{
            font-size:13px;
            font-weight:600;
            color:var(--secondary);
            letter-spacing:2px;
            text-transform:uppercase;
            margin-bottom:12px;
            display:block;
        }
        .glass-divider{
            height:1px;
            background:linear-gradient(to right,transparent,rgba(255,255,255,0.12),transparent);
            border:none;
            margin:0;
        }
        .back-to-top{
            position:fixed;
            bottom:30px;
            right:30px;
            width:44px;
            height:44px;
            border-radius:50%;
            background:var(--gradient-main);
            border:none;
            color:#fff;
            font-size:20px;
            display:flex;
            align-items:center;
            justify-content:center;
            box-shadow:var(--shadow-btn);
            opacity:0;
            visibility:hidden;
            transform:translateY(10px);
            transition:opacity .3s,transform .3s,visibility .3s;
            z-index:999;
            cursor:pointer;
        }
        .back-to-top.show{
            opacity:1;
            visibility:visible;
            transform:translateY(0);
        }
        .back-to-top:hover{
            box-shadow:0 8px 30px rgba(59,130,246,0.6);
        }

/* roulang page: article */
:root{
    --ky-bg:#0B0F19;
    --ky-bg-secondary:#131A2A;
    --ky-primary:#3B82F6;
    --ky-accent:#22D3EE;
    --ky-text:#F0F4FF;
    --ky-text-secondary:#94A3B8;
    --ky-text-muted:#64748B;
    --ky-card-bg:rgba(255,255,255,0.05);
    --ky-card-border:rgba(255,255,255,0.10);
    --ky-radius:16px;
    --ky-radius-sm:10px;
    --ky-shadow:0 8px 30px rgba(0,0,0,0.3);
    --ky-gradient:linear-gradient(135deg,#3B82F6 0%,#22D3EE 100%);
    --ky-glow:rgba(59,130,246,0.5);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
    font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    background:var(--ky-bg);
    color:var(--ky-text);
    line-height:1.75;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:all .3s ease;}
img{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--ky-accent);
    outline-offset:2px;
}
.container{max-width:1320px;padding-left:20px;padding-right:20px;}

/* ===== 按钮 ===== */
.btn{
    border-radius:12px;
    padding:10px 26px;
    font-weight:600;
    font-size:15px;
    transition:all .3s ease;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    border:1px solid transparent;
}
.btn-gradient{
    background:var(--ky-gradient);
    color:#fff;
    border:none;
    box-shadow:0 4px 20px rgba(59,130,246,0.45);
}
.btn-gradient:hover{
    color:#fff;
    transform:translateY(-2px);
    box-shadow:0 8px 28px rgba(59,130,246,0.55),0 0 18px rgba(34,211,238,0.25);
}
.btn-gradient:active{transform:translateY(0);}
.btn-outline-light{
    background:transparent;
    border:1px solid rgba(255,255,255,0.18);
    color:var(--ky-text);
}
.btn-outline-light:hover{
    border-color:var(--ky-accent);
    color:var(--ky-accent);
    background:rgba(34,211,238,0.06);
    transform:translateY(-2px);
}
.btn-ghost{
    background:rgba(255,255,255,0.05);
    border:1px solid rgba(255,255,255,0.12);
    color:var(--ky-text-secondary);
    backdrop-filter:blur(12px);
}
.btn-ghost:hover{
    color:var(--ky-accent);
    border-color:rgba(34,211,238,0.5);
    background:rgba(34,211,238,0.06);
}

/* ===== 站点头部 ===== */
.site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:1000;
    min-height:70px;
    background:rgba(11,15,25,0.85);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid rgba(255,255,255,0.06);
    transition:background .3s ease,box-shadow .3s ease;
}
.site-header.scrolled{
    background:rgba(11,15,25,0.92);
    box-shadow:0 8px 30px rgba(0,0,0,0.35);
}
.site-header .navbar{
    min-height:70px;
    padding:0;
}
.site-header .navbar-brand{
    display:flex;
    align-items:center;
    gap:12px;
    font-size:1.35rem;
    font-weight:800;
    color:var(--ky-text);
    letter-spacing:0.5px;
}
.brand-logo{
    display:inline-flex;
    width:38px;
    height:38px;
    border-radius:10px;
    background:var(--ky-gradient);
    align-items:center;
    justify-content:center;
    flex-shrink:0;
    box-shadow:0 4px 14px rgba(59,130,246,0.35);
}
.brand-logo svg{width:22px;height:22px;fill:#fff;}
.site-header .navbar-nav{gap:4px;}
.site-header .nav-link{
    color:rgba(240,244,255,0.8);
    font-weight:500;
    font-size:15px;
    padding:10px 16px !important;
    position:relative;
    border-radius:8px;
}
.site-header .nav-link:hover{
    color:var(--ky-accent);
    background:rgba(59,130,246,0.08);
}
.site-header .nav-link.active{
    color:var(--ky-accent);
    background:rgba(59,130,246,0.10);
}
.site-header .nav-link.active::after{
    content:'';
    position:absolute;
    left:16px;right:16px;
    bottom:2px;
    height:2px;
    border-radius:2px;
    background:var(--ky-gradient);
}
.nav-actions{
    display:flex;
    align-items:center;
    gap:12px;
}
.nav-actions .btn{
    padding:8px 20px;
    font-size:14px;
}
.navbar-toggler{
    border:none;
    padding:6px;
    background:transparent;
}
.navbar-toggler:focus{box-shadow:none;outline:none;}
.toggler-icon{
    display:block;
    width:24px;
    height:2px;
    background:var(--ky-text);
    margin:5px 0;
    border-radius:2px;
    transition:all .3s ease;
}

/* ===== 面包屑 ===== */
.breadcrumb-nav{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:8px;
    font-size:13px;
    color:var(--ky-text-muted);
    margin-bottom:24px;
}
.breadcrumb-nav a{color:var(--ky-text-muted);}
.breadcrumb-nav a:hover{color:var(--ky-accent);}
.breadcrumb-nav .sep{color:#475569;font-size:14px;}
.breadcrumb-nav .current{color:var(--ky-text-secondary);max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ===== 文章 Hero ===== */
.article-hero{
    position:relative;
    padding:130px 0 60px;
    background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
}
.article-hero::before{
    content:'';
    position:absolute;
    inset:0;
    background:linear-gradient(to bottom,rgba(11,15,25,0.55),rgba(11,15,25,0.96));
}
.article-hero .container{
    position:relative;
    z-index:1;
    max-width:980px;
}
.article-hero h1{
    font-size:clamp(1.8rem,3.4vw,2.6rem);
    font-weight:800;
    line-height:1.4;
    margin-bottom:20px;
    letter-spacing:0.5px;
}
.article-meta{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:18px;
    color:var(--ky-text-secondary);
    font-size:13px;
}
.article-meta i{color:var(--ky-primary);margin-right:5px;}
.article-meta a{color:var(--ky-text-secondary);}
.article-meta a:hover{color:var(--ky-accent);}

/* ===== 正文区域 ===== */
.article-main{background:var(--ky-bg);}
.article-body{
    max-width:800px;
    margin:0 auto;
    padding:48px 20px 20px;
}
.article-card{
    background:var(--ky-card-bg);
    border:1px solid var(--ky-card-border);
    border-radius:20px;
    padding:44px 52px;
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    box-shadow:var(--ky-shadow);
}
.article-content-body{
    font-size:16px;
    line-height:1.85;
    color:rgba(240,244,255,0.92);
    text-align:justify;
    -webkit-hyphens:auto;
    hyphens:auto;
}
.article-content-body h2{
    font-size:1.5rem;
    font-weight:700;
    margin:2.2rem 0 1rem;
    padding-left:16px;
    border-left:4px solid var(--ky-primary);
    border-radius:2px;
    line-height:1.4;
}
.article-content-body h3{
    font-size:1.25rem;
    font-weight:600;
    margin:1.8rem 0 0.8rem;
    color:var(--ky-text);
}
.article-content-body h4{
    font-size:1.05rem;
    font-weight:600;
    margin:1.4rem 0 0.6rem;
}
.article-content-body p{margin-bottom:1.2rem;line-height:1.8;}
.article-content-body a{color:var(--ky-accent);border-bottom:1px solid rgba(34,211,238,0.3);}
.article-content-body a:hover{color:#67e8f9;border-bottom-color:#67e8f9;}
.article-content-body img{
    max-width:100%;
    height:auto;
    border-radius:14px;
    border:1px solid var(--ky-card-border);
    margin:1.5rem 0;
}
.article-content-body blockquote{
    border-left:4px solid var(--ky-primary);
    background:rgba(59,130,246,0.08);
    padding:14px 24px;
    border-radius:0 14px 14px 0;
    margin:1.5rem 0;
    color:var(--ky-text-secondary);
    font-style:normal;
}
.article-content-body ul,
.article-content-body ol{
    padding-left:1.4rem;
    margin-bottom:1.2rem;
}
.article-content-body li{margin-bottom:0.5rem;}
.article-content-body pre{
    background:#1E293B;
    color:#E2E8F0;
    padding:18px 22px;
    border-radius:12px;
    overflow-x:auto;
    margin:1.5rem 0;
    font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
    font-size:14px;
    line-height:1.6;
}
.article-content-body code{
    background:rgba(30,41,59,0.9);
    color:#7dd3fc;
    padding:3px 7px;
    border-radius:5px;
    font-size:0.9em;
    font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.article-content-body pre code{
    background:transparent;
    padding:0;
    color:inherit;
}
.article-content-body table{
    width:100%;
    border-collapse:collapse;
    margin:1.5rem 0;
    font-size:14px;
}
.article-content-body th,
.article-content-body td{
    border:1px solid rgba(255,255,255,0.10);
    padding:10px 14px;
    text-align:left;
}
.article-content-body th{
    background:rgba(59,130,246,0.10);
    color:var(--ky-text);
    font-weight:600;
}
.article-content-body hr{
    border:none;
    border-top:1px solid rgba(255,255,255,0.10);
    margin:2rem 0;
}

/* ===== 无文章占位 ===== */
.not-found-box{
    text-align:center;
    padding:60px 20px;
}
.not-found-icon{
    width:80px;
    height:80px;
    border-radius:50%;
    background:rgba(59,130,246,0.12);
    display:flex;
    align-items:center;
    justify-content:center;
    margin:0 auto 24px;
    font-size:36px;
    color:var(--ky-primary);
    border:1px solid rgba(59,130,246,0.25);
}
.not-found-box h2{
    font-size:1.6rem;
    font-weight:700;
    margin-bottom:14px;
}
.not-found-box p{
    color:var(--ky-text-secondary);
    margin-bottom:28px;
}

/* ===== 标签与分享 ===== */
.article-share{
    max-width:760px;
    margin:0 auto;
    padding:20px 20px 50px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    gap:18px;
}
.tags-wrap{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
}
.tag-badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    background:rgba(255,255,255,0.06);
    border:1px solid rgba(255,255,255,0.08);
    padding:6px 16px;
    border-radius:999px;
    font-size:13px;
    color:var(--ky-text-secondary);
    cursor:default;
    transition:all .3s ease;
}
.tag-badge:hover{
    color:var(--ky-accent);
    border-color:rgba(34,211,238,0.4);
}
.share-btns{
    display:flex;
    gap:10px;
}
.share-btn{
    width:42px;
    height:42px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:12px;
    background:rgba(255,255,255,0.06);
    border:1px solid rgba(255,255,255,0.10);
    color:var(--ky-text-secondary);
    font-size:16px;
    transition:all .3s ease;
}
.share-btn:hover{
    color:var(--ky-accent);
    border-color:rgba(34,211,238,0.5);
    background:rgba(34,211,238,0.06);
    transform:translateY(-3px);
    box-shadow:0 6px 20px rgba(34,211,238,0.15);
}

/* ===== 相关阅读 ===== */
.related-section{
    background:var(--ky-bg-secondary);
    padding:70px 0 80px;
    position:relative;
    overflow:hidden;
}
.related-section::before{
    content:'';
    position:absolute;
    top:0;left:0;right:0;
    height:1px;
    background:linear-gradient(90deg,transparent,rgba(59,130,246,0.4),rgba(34,211,238,0.4),transparent);
}
.section-head{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:34px;
}
.section-title{
    font-size:1.7rem;
    font-weight:700;
    position:relative;
    padding-left:16px;
    margin:0;
    line-height:1.4;
}
.section-title::before{
    content:'';
    position:absolute;
    left:0;top:6px;bottom:6px;
    width:4px;
    border-radius:4px;
    background:var(--ky-gradient);
}
.section-link{
    color:var(--ky-text-secondary);
    font-size:14px;
    display:inline-flex;
    align-items:center;
    gap:6px;
}
.section-link:hover{
    color:var(--ky-accent);
}
.related-track{
    display:flex;
    gap:24px;
    overflow-x:auto;
    padding:6px 4px 16px;
    scroll-snap-type:x mandatory;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
}
.related-track::-webkit-scrollbar{display:none;}
.related-card{
    flex:0 0 340px;
    max-width:340px;
    scroll-snap-align:start;
    background:rgba(255,255,255,0.05);
    border:1px solid rgba(255,255,255,0.10);
    border-radius:16px;
    overflow:hidden;
    transition:all .3s ease;
    display:flex;
    flex-direction:column;
}
.related-card:hover{
    transform:translateY(-6px);
    border-color:rgba(59,130,246,0.6);
    box-shadow:0 12px 40px rgba(0,0,0,0.45),0 0 24px rgba(59,130,246,0.15);
}
.related-card .related-thumb{
    position:relative;
    height:170px;
    overflow:hidden;
}
.related-card .related-thumb img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .5s ease;
}
.related-card:hover .related-thumb img{
    transform:scale(1.05);
}
.related-card .related-badge{
    position:absolute;
    top:14px;left:14px;
    background:var(--ky-gradient);
    color:#fff;
    font-size:12px;
    font-weight:600;
    padding:4px 12px;
    border-radius:8px;
    box-shadow:0 4px 14px rgba(59,130,246,0.35);
}
.related-card .related-body{
    padding:20px 22px 22px;
    display:flex;
    flex-direction:column;
    flex:1;
}
.related-card .related-body h3{
    font-size:1.05rem;
    font-weight:600;
    line-height:1.5;
    margin-bottom:10px;
    color:var(--ky-text);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.related-card .related-body p{
    font-size:13px;
    color:var(--ky-text-secondary);
    line-height:1.6;
    margin-bottom:14px;
    flex:1;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.related-card .related-link{
    color:var(--ky-accent);
    font-size:13px;
    font-weight:500;
    display:inline-flex;
    align-items:center;
    gap:6px;
}
.related-card .related-link:hover{color:#67e8f9;}

/* ===== 返回入口 ===== */
.article-back{
    text-align:center;
    padding:0 0 80px;
    background:var(--ky-bg-secondary);
}
.article-back .btn{
    min-width:180px;
}

/* ===== 页脚 ===== */
.site-footer{
    background:var(--ky-bg);
    border-top:2px solid transparent;
    border-image:linear-gradient(90deg,#3B82F6,#22D3EE) 1;
    padding:60px 0 0;
    position:relative;
}
.footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr 1.2fr;
    gap:44px;
    margin-bottom:48px;
}
.footer-brand{
    display:flex;
    align-items:center;
    gap:12px;
    font-size:1.35rem;
    font-weight:800;
    color:var(--ky-text);
    margin-bottom:16px;
}
.footer-about p{
    color:var(--ky-text-secondary);
    font-size:14px;
    line-height:1.75;
    margin:0;
    max-width:320px;
}
.footer-col h4{
    font-size:15px;
    font-weight:600;
    color:var(--ky-text);
    margin-bottom:18px;
    position:relative;
    padding-bottom:10px;
}
.footer-col h4::after{
    content:'';
    position:absolute;
    bottom:0;left:0;
    width:28px;
    height:2px;
    border-radius:2px;
    background:var(--ky-gradient);
}
.footer-col ul{
    list-style:none;
    padding:0;
    margin:0;
}
.footer-col ul li{
    margin-bottom:10px;
}
.footer-col ul a{
    color:var(--ky-text-secondary);
    font-size:14px;
    transition:all .3s ease;
}
.footer-col ul a:hover{
    color:var(--ky-accent);
    padding-left:4px;
}
.footer-contact li{
    color:var(--ky-text-secondary);
    font-size:14px;
    display:flex;
    align-items:flex-start;
    gap:10px;
    margin-bottom:14px;
}
.footer-contact i{
    color:var(--ky-primary);
    margin-top:2px;
}
.footer-bottom{
    border-top:1px solid rgba(255,255,255,0.06);
    padding:20px 0;
    text-align:center;
    color:var(--ky-text-muted);
    font-size:13px;
}

/* ===== 响应式 ===== */
@media (max-width:991.98px){
    .site-header .navbar-collapse{
        background:rgba(11,15,25,0.97);
        border:1px solid rgba(255,255,255,0.08);
        border-radius:16px;
        padding:20px;
        margin-top:14px;
        box-shadow:0 20px 50px rgba(0,0,0,0.5);
        backdrop-filter:blur(20px);
    }
    .site-header .navbar-nav{
        gap:4px;
        margin-bottom:16px;
    }
    .site-header .nav-link{
        padding:12px 16px !important;
        border-radius:10px;
    }
    .nav-actions{
        width:100%;
        gap:10px;
    }
    .nav-actions .btn{
        flex:1;
    }
    .footer-grid{
        grid-template-columns:1fr 1fr;
        gap:36px;
    }
}
@media (max-width:767.98px){
    .site-header .navbar-brand{
        font-size:1.15rem;
    }
    .brand-logo{
        width:34px;
        height:34px;
    }
    .article-hero{
        padding:110px 0 40px;
    }
    .article-hero h1{
        font-size:1.45rem;
    }
    .article-body{
        padding:28px 16px 10px;
    }
    .article-card{
        padding:26px 20px;
        border-radius:16px;
    }
    .article-content-body{
        font-size:15px;
        line-height:1.8;
    }
    .article-share{
        flex-direction:column;
        align-items:flex-start;
        gap:16px;
    }
    .related-card{
        flex:0 0 88vw;
        max-width:88vw;
    }
    .section-title{
        font-size:1.35rem;
    }
    .footer-grid{
        grid-template-columns:1fr;
        gap:32px;
    }
}
@media (max-width:520px){
    .article-card{
        padding:22px 16px;
    }
    .breadcrumb-nav .current{
        max-width:200px;
    }
    .related-card{
        flex:0 0 86vw;
        max-width:86vw;
    }
    .footer-bottom{
        font-size:12px;
    }
}

/* roulang page: category1 */
:root {
            --bg-primary: #0B0F19;
            --bg-secondary: #131A2A;
            --primary: #3B82F6;
            --secondary: #22D3EE;
            --grad-main: linear-gradient(135deg, #3B82F6 0%, #22D3EE 100%);
            --text-primary: #F0F4FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --card-bg: rgba(255, 255, 255, 0.05);
            --card-border: rgba(255, 255, 255, 0.10);
            --glow-primary: rgba(59, 130, 246, 0.5);
            --glow-secondary: rgba(34, 211, 238, 0.4);
            --success: #10B981;
            --warning: #F59E0B;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 12px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(59, 130, 246, 0.15);
            --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

        ::selection {
            background: rgba(59, 130, 246, 0.4);
            color: #fff;
        }

        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ---------- Header 导航 ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: transparent;
            height: 70px;
            display: flex;
            align-items: center;
            transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
            border-bottom: 1px solid transparent;
        }

        .site-header.scrolled {
            background: rgba(11, 15, 25, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

        .site-header .navbar {
            padding: 0;
            width: 100%;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: #fff !important;
            letter-spacing: 0.02em;
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--grad-main);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
            flex-shrink: 0;
        }

        .brand-logo svg {
            width: 20px;
            height: 20px;
            fill: #fff;
        }

        .navbar-nav {
            gap: 4px;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            color: var(--text-secondary) !important;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: color 0.3s ease, background 0.3s ease;
            position: relative;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 24px;
            height: 2px;
            background: var(--grad-main);
            border-radius: 2px;
            transition: transform 0.3s ease;
        }

        .nav-link:hover,
        .nav-link.active {
            color: #fff !important;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: 16px;
        }

        .btn-outline-light {
            border: 1px solid rgba(255, 255, 255, 0.28);
            color: var(--text-primary) !important;
            border-radius: var(--radius-btn);
            padding: 8px 20px;
            font-size: 0.9rem;
            font-weight: 500;
            background: transparent;
            transition: all 0.3s ease;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        .btn-gradient {
            background: var(--grad-main);
            color: #fff !important;
            border: none;
            border-radius: var(--radius-btn);
            padding: 10px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(59, 130, 246, 0.45);
            transition: all 0.3s ease;
            display: inline-block;
        }

        .btn-gradient:hover {
            box-shadow: 0 6px 28px rgba(59, 130, 246, 0.6), 0 0 24px rgba(34, 211, 238, 0.2);
            transform: translateY(-2px);
            color: #fff !important;
        }

        .navbar-toggler {
            border: none;
            padding: 8px;
            background: transparent;
            display: flex;
            flex-direction: column;
            gap: 5px;
        }

        .toggler-icon {
            width: 26px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        /* ---------- 分类 Banner ---------- */
        .category-hero {
            position: relative;
            min-height: 50vh;
            padding: 140px 0 70px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 25, 0.55) 0%, rgba(11, 15, 25, 0.78) 55%, var(--bg-primary) 100%);
            z-index: 1;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.16) 0%, transparent 60%);
            z-index: 1;
            pointer-events: none;
        }

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

        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .hero-breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.3s;
        }

        .hero-breadcrumb a:hover {
            color: var(--secondary);
        }

        .hero-breadcrumb .sep {
            color: var(--text-muted);
        }

        .hero-breadcrumb .current {
            color: var(--secondary);
        }

        .category-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
            color: #fff;
        }

        .category-hero h1 .highlight {
            background: var(--grad-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .category-hero .lead-text {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 28px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-actions .btn-ghost {
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: var(--text-primary) !important;
            border-radius: var(--radius-btn);
            padding: 11px 28px;
            font-weight: 500;
            font-size: 0.95rem;
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }

        .hero-actions .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.09);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-2px);
            color: #fff !important;
        }

        /* ---------- 数据统计 ---------- */
        .stats-section {
            padding: 70px 0 30px;
            background: var(--bg-primary);
            position: relative;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-6px);
            border-color: rgba(59, 130, 246, 0.5);
            box-shadow: var(--shadow-hover);
        }

        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            background: var(--grad-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* ---------- 产品展示 ---------- */
        .showcase-section {
            padding: 80px 0 60px;
            background: var(--bg-primary);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .section-head h2 {
            font-size: clamp(1.6rem, 2.8vw, 2.1rem);
            font-weight: 700;
            margin: 0;
            position: relative;
            padding-left: 18px;
            line-height: 1.4;
        }

        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 32px;
            border-radius: 4px;
            background: var(--grad-main);
        }

        .section-head .sub {
            color: var(--text-secondary);
            font-size: 0.95rem;
            max-width: 480px;
            text-align: right;
        }

        .showcase-row {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
            margin-bottom: 24px;
        }

        .showcase-row-reverse {
            grid-template-columns: 1fr 1fr;
        }

        .feature-card {
            position: relative;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(59, 130, 246, 0.55);
            box-shadow: var(--shadow-hover);
        }

        .feature-card .card-img-wrap {
            position: relative;
            height: 210px;
            overflow: hidden;
        }

        .feature-card.large .card-img-wrap {
            height: 260px;
        }

        .feature-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .feature-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .feature-card .card-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(11, 15, 25, 0.85) 100%);
        }

        .feature-card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .feature-card .card-tag {
            display: inline-block;
            background: rgba(34, 211, 238, 0.15);
            color: var(--secondary);
            border: 1px solid rgba(34, 211, 238, 0.25);
            border-radius: 999px;
            padding: 3px 14px;
            font-size: 0.78rem;
            font-weight: 500;
            align-self: flex-start;
        }

        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #fff;
            margin: 2px 0 0;
        }

        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }

        .feature-card .card-link {
            color: var(--secondary);
            font-size: 0.85rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.3s ease;
        }

        .feature-card .card-link:hover {
            gap: 8px;
            color: var(--primary);
        }

        .stack-cards {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .stack-card {
            display: flex;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            flex: 1;
        }

        .stack-card:hover {
            transform: translateY(-4px);
            border-color: rgba(59, 130, 246, 0.45);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(59, 130, 246, 0.12);
        }

        .stack-card .thumb {
            width: 110px;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
        }

        .stack-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .stack-card:hover .thumb img {
            transform: scale(1.06);
        }

        .stack-card .info {
            padding: 18px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }

        .stack-card .info .mini-tag {
            font-size: 0.7rem;
            color: var(--warning);
            font-weight: 600;
            letter-spacing: 0.04em;
        }

        .stack-card .info h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin: 0;
        }

        .stack-card .info p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        /* 全宽横幅条 */
        .banner-strip {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            margin-bottom: 24px;
            min-height: 220px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            border: 1px solid var(--card-border);
        }

        .banner-strip::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 15, 25, 0.85) 0%, rgba(11, 15, 25, 0.35) 70%, rgba(11, 15, 25, 0.15) 100%);
        }

        .banner-strip .banner-content {
            position: relative;
            z-index: 2;
            padding: 36px 48px;
            max-width: 640px;
        }

        .banner-strip .banner-tag {
            display: inline-block;
            background: rgba(245, 158, 11, 0.16);
            border: 1px solid rgba(245, 158, 11, 0.3);
            color: var(--warning);
            font-size: 0.75rem;
            border-radius: 999px;
            padding: 3px 14px;
            margin-bottom: 12px;
        }

        .banner-strip h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .banner-strip p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin: 0;
            line-height: 1.7;
        }

        /* 双列卡片 */
        .showcase-row-equal {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        /* ---------- 选型流程 ---------- */
        .process-section {
            padding: 80px 0;
            background: var(--bg-secondary);
            position: relative;
        }

        .process-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.4), rgba(34, 211, 238, 0.4), transparent);
        }

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

        .process-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            position: relative;
            transition: transform 0.3s ease, border-color 0.3s ease;
        }

        .process-card:hover {
            transform: translateY(-6px);
            border-color: rgba(59, 130, 246, 0.5);
        }

        .process-card .step-num {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.4), rgba(34, 211, 238, 0.35));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 16px;
        }

        .process-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }

        .process-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ---------- 子分类横条 ---------- */
        .subcategory-section {
            padding: 70px 0;
            background: var(--bg-primary);
        }

        .subcategory-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .subcategory-strip {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 26px 28px;
            display: flex;
            align-items: center;
            gap: 18px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: all 0.3s ease;
        }

        .subcategory-strip:hover {
            transform: translateY(-4px);
            border-color: rgba(59, 130, 246, 0.5);
            box-shadow: 0 10px 32px rgba(0, 0, 0, 0.35), 0 0 20px rgba(59, 130, 246, 0.1);
        }

        .subcategory-strip .strip-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--grad-main);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
        }

        .subcategory-strip .strip-icon i {
            font-size: 22px;
            color: #fff;
        }

        .subcategory-strip .strip-info {
            flex: 1;
        }

        .subcategory-strip .strip-info h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 3px;
        }

        .subcategory-strip .strip-info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
        }

        .subcategory-strip a {
            color: var(--secondary);
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
            transition: gap 0.3s ease;
        }

        .subcategory-strip a:hover {
            gap: 8px;
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-secondary);
        }

        .accordion {
            max-width: 860px;
            margin: 0 auto;
            --bs-accordion-bg: transparent;
            --bs-accordion-border-color: transparent;
            --bs-accordion-btn-bg: transparent;
            --bs-accordion-active-bg: transparent;
            --bs-accordion-btn-color: #fff;
            --bs-accordion-active-color: #fff;
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-border-width: 0;
            --bs-accordion-border-radius: 0;
        }

        .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border) !important;
            border-radius: var(--radius-card) !important;
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: border-color 0.3s ease;
        }

        .accordion-item:not(.show) {
            border-color: rgba(255, 255, 255, 0.08) !important;
        }

        .accordion-item .accordion-button {
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border-radius: var(--radius-card) !important;
            box-shadow: none;
        }

        .accordion-item .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2322D3EE' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: transform 0.3s ease;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }

        .accordion-button:focus {
            box-shadow: none;
        }

        .accordion-button:not(.collapsed) {
            color: var(--secondary) !important;
            background: transparent;
        }

        .accordion-body {
            padding: 0 24px 22px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.75;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .cta-banner {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            padding: 64px 48px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.95), rgba(34, 211, 238, 0.8));
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: 0 20px 60px rgba(59, 130, 246, 0.35);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
            background-size: 24px 24px;
            opacity: 0.5;
            pointer-events: none;
        }

        .cta-banner .cta-text {
            position: relative;
            z-index: 2;
        }

        .cta-banner h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }

        .cta-banner p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.9);
            margin: 0;
        }

        .cta-banner .btn-white {
            background: #fff;
            color: #1e293b !important;
            border: none;
            border-radius: var(--radius-btn);
            padding: 13px 36px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            z-index: 2;
            white-space: nowrap;
        }

        .cta-banner .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
            color: #1e293b !important;
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background: var(--bg-primary);
            position: relative;
            padding: 70px 0 0;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--grad-main);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 50px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-about p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

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

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color 0.3s ease, padding-left 0.3s ease;
        }

        .footer-col ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-contact li i {
            color: var(--secondary);
            font-size: 1rem;
            margin-top: 3px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding: 22px 0;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 1199.98px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero {
                min-height: 46vh;
            }
        }

        @media (max-width: 991.98px) {
            .site-header {
                background: rgba(11, 15, 25, 0.85);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

            .navbar-collapse {
                background: rgba(19, 26, 42, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border: 1px solid var(--card-border);
                border-radius: 16px;
                padding: 24px;
                margin-top: 12px;
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
                max-height: calc(100vh - 90px);
                overflow-y: auto;
            }

            .navbar-nav {
                gap: 6px;
                margin-bottom: 18px;
            }

            .nav-link {
                padding: 10px 16px !important;
                font-size: 1rem;
            }

            .nav-actions {
                margin-left: 0;
                padding-top: 14px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                flex-direction: row;
            }

            .category-hero {
                padding: 120px 0 56px;
            }

            .showcase-row {
                grid-template-columns: 1fr;
            }

            .showcase-row-reverse {
                grid-template-columns: 1fr;
            }

            .showcase-row-equal {
                grid-template-columns: 1fr;
            }

            .subcategory-row {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .stat-card {
                padding: 20px 14px;
            }

            .stat-card .num {
                font-size: 1.6rem;
            }

            .stat-card .label {
                font-size: 0.78rem;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .category-hero h1 {
                font-size: 2rem;
            }

            .category-hero .lead-text {
                font-size: 0.95rem;
            }

            .banner-strip .banner-content {
                padding: 28px 24px;
            }

            .banner-strip h3 {
                font-size: 1.3rem;
            }

            .cta-banner {
                padding: 40px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .stack-card {
                flex-direction: row;
            }

            .stack-card .thumb {
                width: 88px;
            }

            .stack-card .info p {
                -webkit-line-clamp: 2;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .section-head .sub {
                text-align: left;
            }

            .hero-actions .btn-gradient,
            .hero-actions .btn-ghost {
                width: 100%;
                text-align: center;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0B0F19;
            --bg-secondary: #131A2A;
            --bg-tertiary: #0F1522;
            --primary: #3B82F6;
            --accent: #22D3EE;
            --gradient: linear-gradient(135deg, #3B82F6 0%, #22D3EE 100%);
            --text-primary: #F0F4FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --card-bg: rgba(255, 255, 255, 0.05);
            --card-border: rgba(255, 255, 255, 0.10);
            --success: #10B981;
            --warning: #F59E0B;
            --danger: #EF4444;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 12px;
            --radius-badge: 999px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(59, 130, 246, 0.15);
            --shadow-glow: 0 4px 20px rgba(59, 130, 246, 0.45);
            --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --spacing-section: 88px;
            --spacing-section-mobile: 60px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body.modal-open,
        body.nav-open {
            overflow: hidden;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        button {
            font-family: inherit;
        }

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

        .container {
            max-width: 1320px;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding: var(--spacing-section) 0;
        }

        .section-alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .section-heading {
            margin-bottom: 40px;
        }

        .section-heading .sub-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.2);
            padding: 6px 16px;
            border-radius: var(--radius-badge);
            margin-bottom: 14px;
        }

        .section-heading h2 {
            font-size: 1.9rem;
            font-weight: 700;
            line-height: 1.35;
            margin: 0;
            position: relative;
            padding-left: 18px;
        }

        .section-heading h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 2px;
            background: var(--gradient);
        }

        .section-heading .section-desc {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 680px;
            margin-top: 14px;
            line-height: 1.75;
        }

        .text-gradient {
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .btn {
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            transition: all 0.3s ease;
            border: 1px solid transparent;
            font-size: 15px;
            letter-spacing: 0.3px;
        }

        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            box-shadow: none;
        }

        .btn-gradient {
            background: var(--gradient);
            color: #fff;
            border: none;
            box-shadow: var(--shadow-glow);
        }

        .btn-gradient:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(59, 130, 246, 0.55), 0 2px 10px rgba(34, 211, 238, 0.3);
        }

        .btn-gradient:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(59, 130, 246, 0.4);
        }

        .btn-outline-light {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-primary);
            padding: 10px 24px;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .btn-outline-light:active {
            background: rgba(255, 255, 255, 0.1);
        }

        .btn-outline-accent {
            background: rgba(34, 211, 238, 0.06);
            border: 1px solid rgba(34, 211, 238, 0.5);
            color: var(--accent);
            padding: 10px 24px;
        }

        .btn-outline-accent:hover {
            background: rgba(34, 211, 238, 0.14);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: 70px;
            background: transparent;
            transition: background 0.35s ease, backdrop-filter 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
            border-bottom: 1px solid transparent;
        }

        .site-header.scrolled {
            background: rgba(11, 15, 25, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom-color: rgba(255, 255, 255, 0.06);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
        }

        .site-header .navbar {
            padding: 0;
            height: 70px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }

        .navbar-brand:hover {
            color: var(--text-primary);
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--gradient);
            border-radius: 10px;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
            flex-shrink: 0;
        }

        .brand-logo svg {
            width: 22px;
            height: 22px;
            fill: #fff;
        }

        .navbar-nav {
            gap: 8px;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 10px;
            transition: color 0.3s, background-color 0.3s;
            position: relative;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--gradient);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.3s ease;
        }

        .nav-link:hover {
            color: var(--accent);
            background: rgba(255, 255, 255, 0.03);
        }

        .nav-link:hover::after {
            transform: scaleX(1);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(59, 130, 246, 0.12);
        }

        .nav-link.active::after {
            transform: scaleX(1);
        }

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

        .nav-actions .btn {
            padding: 8px 24px;
            font-size: 14px;
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            padding: 6px 10px;
            background: rgba(255, 255, 255, 0.04);
            box-shadow: none !important;
            outline: none !important;
            display: flex;
            flex-direction: column;
            gap: 5px;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 40px;
        }

        .toggler-icon {
            display: block;
            width: 20px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        @media (max-width: 991.98px) {
            .site-header {
                background: rgba(11, 15, 25, 0.9);
                backdrop-filter: blur(18px);
                border-bottom-color: rgba(255, 255, 255, 0.06);
            }
            .navbar-collapse {
                background: rgba(13, 18, 30, 0.97);
                backdrop-filter: blur(20px);
                border: 1px solid rgba(255, 255, 255, 0.08);
                border-radius: 16px;
                padding: 20px;
                margin-top: 12px;
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
            }
            .navbar-nav {
                gap: 4px;
            }
            .nav-link {
                padding: 12px 16px !important;
                border-radius: 10px;
            }
            .nav-actions {
                flex-direction: row;
                gap: 10px;
                margin-top: 16px;
                padding-top: 16px;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-actions .btn {
                flex: 1;
                text-align: center;
            }
        }

        /* ===== 分类 Banner ===== */
        .category-hero {
            min-height: 52vh;
            display: flex;
            align-items: flex-end;
            position: relative;
            padding: 150px 0 80px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: scroll;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(11, 15, 25, 0.55) 0%, rgba(11, 15, 25, 0.75) 60%, rgba(11, 15, 25, 0.96) 100%);
        }

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

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            border-radius: var(--radius-badge);
            padding: 6px 18px;
            font-size: 13px;
            letter-spacing: 1px;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .category-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.3;
            margin: 0 0 20px;
            color: #fff;
        }

        .category-hero .hero-lead {
            color: var(--text-secondary);
            font-size: 17px;
            line-height: 1.8;
            max-width: 760px;
            margin-bottom: 28px;
        }

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

        .hero-metrics {
            display: flex;
            gap: 40px;
            margin-top: 44px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            flex-wrap: wrap;
        }

        .hero-metrics .metric-item {
            display: flex;
            flex-direction: column;
        }

        .hero-metrics .metric-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-metrics .metric-value span {
            font-size: 1rem;
            font-weight: 500;
            color: var(--accent);
        }

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

        /* ===== 方案体系 ===== */
        .offer-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr 1fr;
            gap: 24px;
        }

        .offer-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            padding: 32px 28px;
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .offer-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--gradient);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .offer-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(59, 130, 246, 0.5);
        }

        .offer-card:hover::before {
            opacity: 1;
        }

        .offer-card.span-wide {
            grid-column: span 1;
        }

        .offer-card.offset-right {
            transform: translateY(30px);
        }

        .offer-card.offset-right:hover {
            transform: translateY(24px);
        }

        .offer-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(59, 130, 246, 0.12);
            font-size: 1.4rem;
            color: var(--accent);
            margin-bottom: 20px;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        .offer-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: #fff;
        }

        .offer-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        .offer-card .offer-tag {
            display: inline-block;
            margin-top: 16px;
            font-size: 12px;
            color: var(--accent);
            background: rgba(34, 211, 238, 0.1);
            border-radius: var(--radius-badge);
            padding: 4px 14px;
            border: 1px solid rgba(34, 211, 238, 0.15);
        }

        .offer-card .offer-img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 20px;
            border: 1px solid var(--card-border);
        }

        @media (max-width: 991.98px) {
            .offer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .offer-card.offset-right {
                transform: none;
            }
            .offer-card.offset-right:hover {
                transform: translateY(-6px);
            }
        }

        @media (max-width: 575.98px) {
            .offer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 场景展示 ===== */
        .scene-section {
            position: relative;
        }

        .scene-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.4fr;
            gap: 24px;
            align-items: stretch;
        }

        .scene-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .scene-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--card-border);
            border-radius: 14px;
            padding: 24px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all 0.3s ease;
            flex: 1;
        }

        .scene-item:hover {
            background: rgba(59, 130, 246, 0.08);
            border-color: rgba(59, 130, 246, 0.45);
        }

        .scene-num {
            font-size: 1.6rem;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
            min-width: 48px;
        }

        .scene-item h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
        }

        .scene-item p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .scene-banner {
            border-radius: var(--radius-card);
            overflow: hidden;
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            background: linear-gradient(180deg, rgba(11, 15, 25, 0.2) 0%, rgba(11, 15, 25, 0.7) 100%), url('/assets/images/coverpic/cover-3.png') center/cover no-repeat;
            border: 1px solid var(--card-border);
        }

        .scene-banner-content {
            padding: 32px;
            width: 100%;
        }

        .scene-banner-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .scene-banner-content p {
            color: rgba(240, 244, 255, 0.85);
            font-size: 14px;
            margin: 0;
            max-width: 360px;
        }

        @media (max-width: 991.98px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .scene-banner {
                min-height: 260px;
            }
        }

        /* ===== 服务流程 ===== */
        .process-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .process-step {
            position: relative;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 32px 24px 28px;
            transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
        }

        .process-step:hover {
            transform: translateY(-5px);
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }

        .process-step::before {
            counter-increment: step;
            content: "0" counter(step);
            display: block;
            font-size: 1.15rem;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 16px;
        }

        .process-step h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 13.5px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        .process-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.2rem;
            color: rgba(34, 211, 238, 0.5);
            z-index: 2;
        }

        @media (max-width: 991.98px) {
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
            .process-arrow {
                display: none;
            }
        }

        @media (max-width: 575.98px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 专题横条 ===== */
        .topic-strips {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .topic-strip {
            display: flex;
            align-items: center;
            gap: 20px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(34, 211, 238, 0.06) 100%);
            border: 1px solid rgba(59, 130, 246, 0.25);
            border-radius: var(--radius-card);
            padding: 28px;
            transition: all 0.3s ease;
        }

        .topic-strip:hover {
            border-color: rgba(59, 130, 246, 0.5);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
        }

        .topic-strip .topic-icon {
            width: 56px;
            height: 56px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            background: rgba(59, 130, 246, 0.15);
            border-radius: 16px;
            color: var(--accent);
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        .topic-strip .topic-body {
            flex: 1;
        }

        .topic-strip .topic-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }

        .topic-strip .topic-body p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
        }

        .topic-strip .topic-link {
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .topic-strip .topic-link i {
            transition: transform 0.3s;
        }

        .topic-strip:hover .topic-link i {
            transform: translateX(4px);
        }

        @media (max-width: 767.98px) {
            .topic-strips {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-secondary);
        }

        .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 14px !important;
            margin-bottom: 14px;
            backdrop-filter: blur(16px);
            overflow: hidden;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(59, 130, 246, 0.5);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }

        .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 20px 24px;
            box-shadow: none !important;
            border: none;
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2322D3EE' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            background-size: 16px;
            transition: transform 0.3s ease;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }

        .accordion-button:not(.collapsed) {
            background: rgba(59, 130, 246, 0.08);
            color: var(--accent);
        }

        .accordion-button:focus {
            outline: 2px solid rgba(34, 211, 238, 0.5);
            outline-offset: -2px;
            border-radius: 14px 14px 0 0;
        }

        .accordion-body {
            color: var(--text-secondary);
            padding: 0 24px 24px;
            font-size: 14.5px;
            line-height: 1.75;
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        /* ===== CTA 横幅 ===== */
        .cta-banner {
            background: linear-gradient(120deg, rgba(59, 130, 246, 0.85) 0%, rgba(34, 211, 238, 0.75) 100%);
            border-radius: 20px;
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .cta-banner .row {
            position: relative;
            z-index: 2;
            align-items: center;
        }

        .cta-banner h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.92);
            font-size: 15px;
            margin: 0;
        }

        .cta-banner .btn {
            background: #0B0F19;
            color: #fff;
            border: none;
            padding: 14px 36px;
            font-size: 15px;
            border-radius: var(--radius-btn);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            transition: all 0.3s ease;
        }

        .cta-banner .btn:hover {
            background: #131A2A;
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
        }

        @media (max-width: 575.98px) {
            .cta-banner {
                padding: 40px 24px;
                text-align: center;
            }
            .cta-banner .btn {
                margin-top: 20px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--primary), var(--accent)) 1;
            padding: 64px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-about p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 32px;
            height: 2px;
            background: var(--gradient);
            border-radius: 2px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.3s, padding-left 0.3s;
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact li {
            color: var(--text-secondary);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--accent);
            font-size: 15px;
            width: 20px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 13px;
        }

        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== 通用 ===== */
        .breadcrumb-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 14px;
            flex-wrap: wrap;
        }

        .breadcrumb-links a {
            color: var(--text-muted);
            transition: color 0.3s;
        }

        .breadcrumb-links a:hover {
            color: var(--accent);
        }

        .breadcrumb-links .sep {
            color: rgba(255, 255, 255, 0.4);
        }

        .breadcrumb-links .current {
            color: var(--text-secondary);
        }

        @media (max-width: 767.98px) {
            .section {
                padding: var(--spacing-section-mobile) 0;
            }
            .section-heading h2 {
                font-size: 1.5rem;
            }
            .hero-metrics {
                gap: 24px;
            }
            .hero-metrics .metric-value {
                font-size: 1.4rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0B0F19;
            --bg-secondary: #131A2A;
            --brand-blue: #3B82F6;
            --brand-cyan: #22D3EE;
            --brand-gradient: linear-gradient(135deg, #3B82F6 0%, #22D3EE 100%);
            --text-main: #F0F4FF;
            --text-sub: #94A3B8;
            --text-muted: #64748B;
            --card-bg: rgba(255, 255, 255, 0.05);
            --card-border: rgba(255, 255, 255, 0.10);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 12px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(59, 130, 246, 0.15);
            --shadow-glow: 0 4px 20px rgba(59, 130, 246, 0.45);
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg-primary);
            color: var(--text-main);
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--brand-cyan);
            text-decoration: none;
            transition: color .3s ease;
        }

        a:hover {
            color: #ffffff;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }

        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: transparent;
            transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
        }

        .site-header.scrolled {
            background: rgba(11, 15, 25, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }

        .navbar {
            min-height: 70px;
            padding: 8px 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 0.03em;
            transition: opacity .3s;
        }

        .navbar-brand:hover {
            opacity: 0.88;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--brand-gradient);
            box-shadow: 0 0 18px rgba(59, 130, 246, 0.35);
            flex-shrink: 0;
        }

        .brand-logo svg {
            width: 20px;
            height: 20px;
            fill: #ffffff;
        }

        .navbar-nav .nav-link {
            color: rgba(240, 244, 255, 0.72);
            font-size: 15px;
            font-weight: 500;
            padding: 10px 16px;
            margin: 0 4px;
            position: relative;
            border-radius: 8px;
            transition: color .3s, background .3s;
        }

        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 5px;
            height: 2px;
            background: linear-gradient(90deg, #3B82F6, #22D3EE);
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(0);
            transition: all .3s ease;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.04);
        }

        .navbar-nav .nav-link:hover::after,
        .navbar-nav .nav-link.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: 16px;
        }

        .btn {
            border-radius: var(--radius-btn);
            padding: 11px 26px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            transition: all .3s ease;
            font-family: var(--font-family);
        }

        .btn-gradient {
            background: linear-gradient(135deg, #3B82F6 0%, #22D3EE 100%);
            color: #ffffff;
            border: none;
            box-shadow: 0 4px 20px rgba(59, 130, 246, 0.45);
        }

        .btn-gradient:hover,
        .btn-gradient:focus {
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(59, 130, 246, 0.55);
        }

        .btn-glass {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.20);
            color: var(--text-main);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .btn-glass:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(34, 211, 238, 0.5);
            color: #ffffff;
        }

        .btn-outline-light {
            border: 1px solid rgba(255, 255, 255, 0.30);
            color: var(--text-main);
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.55);
            color: #ffffff;
        }

        .navbar-toggler {
            border: none;
            padding: 6px 8px;
            background: transparent;
        }

        .toggler-icon {
            display: block;
            width: 24px;
            height: 2px;
            background: #ffffff;
            margin: 5px 0;
            border-radius: 2px;
            transition: all .3s;
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(11, 15, 25, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 20px;
                border-radius: 16px;
                margin-top: 12px;
                border: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
            }
            .navbar-nav {
                margin-bottom: 16px;
            }
            .nav-actions {
                margin-left: 0;
                flex-wrap: wrap;
            }
        }

        .category-hero {
            position: relative;
            min-height: 46vh;
            display: flex;
            align-items: center;
            padding: 150px 0 80px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .category-hero .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 25, 0.55) 0%, rgba(11, 15, 25, 0.82) 65%, rgba(11, 15, 25, 0.96) 100%);
            z-index: 1;
        }

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

        .hero-badge {
            display: inline-block;
            background: rgba(59, 130, 246, 0.18);
            border: 1px solid rgba(59, 130, 246, 0.35);
            color: var(--brand-cyan);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }

        .page-title {
            font-size: clamp(2rem, 4.4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #ffffff;
        }

        .page-title .text-gradient {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-text {
            color: rgba(240, 244, 255, 0.82);
            font-size: 16px;
            line-height: 1.8;
            max-width: 680px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .section-block {
            padding: 80px 0;
        }

        .section-block.alt-bg {
            background: var(--bg-secondary);
        }

        .section-heading {
            margin-bottom: 40px;
        }

        .section-title {
            font-size: clamp(1.7rem, 3vw, 2.2rem);
            font-weight: 700;
            position: relative;
            padding-left: 18px;
            margin-bottom: 10px;
            color: #ffffff;
        }

        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 4px;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            border-radius: 4px;
        }

        .section-subtitle {
            color: var(--text-sub);
            font-size: 16px;
            max-width: 720px;
            margin-bottom: 0;
            line-height: 1.8;
        }

        .stat-row {
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            padding: 30px 0;
            margin-top: 40px;
        }

        .stat-item {
            text-align: center;
            padding: 16px 12px;
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .stat-label {
            color: var(--text-sub);
            font-size: 14px;
            margin-top: 4px;
        }

        .glass-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 16px;
            padding: 24px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
            height: 100%;
        }

        .glass-card:hover {
            transform: translateY(-6px);
            border-color: rgba(59, 130, 246, 0.6);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(59, 130, 246, 0.15);
        }

        .product-media {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            height: 100%;
            min-height: 280px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .product-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
            border-radius: 0;
        }

        .product-media:hover img {
            transform: scale(1.04);
        }

        .product-info-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 20px;
            padding: 36px 32px;
            height: 100%;
            position: relative;
            overflow: hidden;
            transition: border-color .3s, box-shadow .3s;
        }

        .product-info-card:hover {
            border-color: rgba(59, 130, 246, 0.45);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }

        .step-no {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            border-radius: 8px;
            padding: 4px 14px;
            margin-bottom: 14px;
            letter-spacing: 0.05em;
        }

        .product-info-card h3 {
            color: #ffffff;
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .product-info-card p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .product-tags {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .product-tags li {
            background: rgba(59, 130, 246, 0.12);
            color: var(--brand-cyan);
            font-size: 13px;
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        .scene-card {
            position: relative;
            border-radius: 18px;
            overflow: hidden;
            min-height: 230px;
            display: flex;
            align-items: flex-end;
            border: 1px solid rgba(255, 255, 255, 0.10);
            background: var(--bg-secondary);
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

        .scene-card:hover {
            transform: translateY(-4px);
            border-color: rgba(59, 130, 246, 0.5);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4), 0 0 20px rgba(59, 130, 246, 0.12);
        }

        .scene-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform .45s ease;
        }

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

        .scene-overlay {
            position: relative;
            z-index: 2;
            padding: 22px 20px;
            width: 100%;
            background: linear-gradient(to top, rgba(11, 15, 25, 0.95) 0%, rgba(11, 15, 25, 0.55) 60%, transparent 100%);
        }

        .scene-overlay h4 {
            color: #ffffff;
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .scene-overlay p {
            color: rgba(240, 244, 255, 0.78);
            font-size: 14px;
            margin: 0;
            line-height: 1.6;
        }

        .table-spec {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 16px;
            overflow: hidden;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .table-spec .table {
            --bs-table-bg: transparent;
            --bs-table-color: var(--text-main);
            margin-bottom: 0;
        }

        .table-spec .table thead th {
            background: rgba(11, 15, 25, 0.8);
            color: var(--brand-cyan);
            font-weight: 600;
            font-size: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 20px;
            white-space: nowrap;
        }

        .table-spec .table tbody td {
            color: var(--text-sub);
            font-size: 14px;
            border-color: rgba(255, 255, 255, 0.06);
            padding: 16px 20px;
            vertical-align: middle;
        }

        .table-spec .table tbody tr:hover td {
            background: rgba(59, 130, 246, 0.05);
            color: var(--text-main);
        }

        .table-spec .table tbody tr:last-child td {
            border-bottom: none;
        }

        .table-badge {
            display: inline-block;
            background: rgba(34, 211, 238, 0.12);
            color: var(--brand-cyan);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
        }

        .process-step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 30px 28px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 18px;
            height: 100%;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: transform .3s, border-color .3s, box-shadow .3s;
        }

        .process-step:hover {
            transform: translateY(-4px);
            border-color: rgba(59, 130, 246, 0.5);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35), 0 0 20px rgba(59, 130, 246, 0.12);
        }

        .process-num {
            font-size: 30px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1px rgba(34, 211, 238, 0.9);
            line-height: 1;
            min-width: 52px;
            padding-top: 4px;
        }

        .process-step h4 {
            color: #ffffff;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .process-step p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(34, 211, 238, 0.18));
            border: 1px solid rgba(59, 130, 246, 0.3);
            margin-bottom: 18px;
        }

        .feature-icon i {
            font-size: 26px;
            color: var(--brand-cyan);
        }

        .glass-card h4 {
            color: #ffffff;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .glass-card .card-text {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        .faq-wrap .accordion-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: border-color .3s;
        }

        .faq-wrap .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(59, 130, 246, 0.5);
        }

        .faq-wrap .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 15px;
            padding: 20px 22px;
            border: none;
            box-shadow: none;
            font-family: var(--font-family);
            transition: color .3s, background .3s;
        }

        .faq-wrap .accordion-button:not(.collapsed) {
            background: rgba(59, 130, 246, 0.10);
            color: #ffffff;
        }

        .faq-wrap .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
        }

        .faq-wrap .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2322D3EE' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            background-size: 14px;
            transition: transform .3s;
        }

        .faq-wrap .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }

        .faq-wrap .accordion-body {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.8;
            padding: 0 22px 22px;
        }

        .cta-banner {
            position: relative;
            background: rgba(19, 26, 42, 0.8);
            border: 1px solid rgba(59, 130, 246, 0.25);
            border-radius: 24px;
            padding: 60px 40px;
            text-align: center;
            overflow: hidden;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.28) 0%, rgba(34, 211, 238, 0.18) 100%);
            z-index: 0;
        }

        .cta-banner .cta-inner {
            position: relative;
            z-index: 1;
        }

        .cta-banner h2 {
            color: #ffffff;
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 700;
            margin-bottom: 10px;
        }

        .cta-banner p {
            color: rgba(240, 244, 255, 0.85);
            font-size: 15px;
            margin-bottom: 24px;
        }

        .site-footer {
            background: var(--bg-primary);
            border-top: 2px solid transparent;
            border-image: linear-gradient(90deg, #3B82F6, #22D3EE) 1;
            padding: 60px 0 24px;
            position: relative;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 14px;
            color: #ffffff;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-brand .brand-logo {
            -webkit-text-fill-color: initial;
            flex-shrink: 0;
        }

        .footer-about p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
            max-width: 300px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-col li {
            margin-bottom: 10px;
        }

        .footer-col a {
            color: var(--text-sub);
            font-size: 14px;
            transition: color .3s;
        }

        .footer-col a:hover {
            color: var(--brand-cyan);
        }

        .footer-contact li {
            color: var(--text-sub);
            font-size: 14px;
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .footer-contact i {
            color: var(--brand-cyan);
            font-size: 15px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding-top: 22px;
            color: var(--text-muted);
            font-size: 13px;
            text-align: center;
        }

        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 767.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-block {
                padding: 56px 0;
            }
            .cta-banner {
                padding: 40px 24px;
            }
            .page-title {
                font-size: 1.9rem;
            }
            .hero-text {
                font-size: 15px;
            }
            .category-hero {
                min-height: 60vh;
            }
            .nav-actions {
                width: 100%;
            }
            .nav-actions .btn {
                flex: 1;
                text-align: center;
            }
            .table-spec {
                overflow-x: auto;
            }
            .table-spec .table {
                min-width: 640px;
            }
        }

        @media (max-width: 520px) {
            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }
            .product-info-card {
                padding: 26px 20px;
            }
            .process-step {
                flex-direction: column;
                gap: 12px;
            }
        }