/* roulang page: index */
:root{
--bg:#050A14;--surface:#0A1424;--glass:rgba(16,30,55,0.55);--glass-border:rgba(255,255,255,0.10);
--primary:#1E5AFF;--primary-dark:#1244CC;--accent:#37E6C9;--warning:#FFB02E;
--t-title:#EEF5FF;--t-body:#B7C4E0;--t-muted:#7186A8;
--r-card:14px;--r-btn:10px;--r-hero:20px;
--shadow-card:0 8px 24px rgba(0,0,0,0.35);--shadow-glow:0 0 20px rgba(30,90,255,0.45),0 0 48px rgba(55,230,201,0.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;background:var(--bg);color:var(--t-body);font-size:15px;line-height:1.75;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit;transition:color .2s}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
/* 背景纹理 */
body::before{content:"";position:fixed;inset:0;z-index:-1;background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);background-size:64px 64px;pointer-events:none}
body::after{content:"";position:fixed;top:-10%;right:-10%;width:600px;height:600px;z-index:-1;background:radial-gradient(circle,rgba(30,90,255,0.12),transparent 70%);pointer-events:none}
/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--r-btn);font-weight:600;letter-spacing:.02em;transition:filter .25s,box-shadow .25s,transform .15s;min-height:44px;padding:0 28px;font-size:15px;color:#fff}
.btn-glow{background:linear-gradient(135deg,var(--primary),var(--primary-dark));box-shadow:var(--shadow-glow)}
.btn-glow:hover{filter:brightness(1.12);box-shadow:0 0 28px rgba(30,90,255,0.55),0 0 56px rgba(55,230,201,0.22)}
.btn-glow:active{transform:scale(0.98)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,0.15);color:var(--t-title)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px}
/* 导航 */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;height:64px;transition:background .3s,box-shadow .3s;background:transparent}
.site-header.scrolled{background:rgba(5,10,20,0.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 1px 0 rgba(255,255,255,0.05)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.header-left{display:flex;align-items:center;gap:32px}
.logo{font-size:20px;font-weight:800;color:var(--t-title);letter-spacing:.02em;white-space:nowrap}
.logo span{color:var(--accent)}
.main-nav{display:flex;gap:24px}
.nav-link{font-size:14px;color:var(--t-body);padding:8px 0;position:relative;transition:color .2s;white-space:nowrap}
.nav-link:hover{color:var(--t-title)}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent);transition:width .25s}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-link.active{color:var(--accent)}
.header-right{display:flex;align-items:center;gap:16px}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:8px;color:var(--t-title);font-size:22px}
.menu-toggle:hover{background:rgba(255,255,255,0.06)}
/* Hero */
.hero{min-height:78vh;display:flex;align-items:center;padding-top:64px;position:relative;overflow:hidden}
.hero-inner{display:flex;align-items:center;gap:48px;width:100%}
.hero-content{flex:1 1 55%;max-width:55%}
.hero h1{font-size:clamp(32px,5vw,56px);font-weight:800;line-height:1.2;color:var(--t-title);margin-bottom:20px}
.hero h1 .accent-text{color:var(--accent)}
.hero-sub{font-size:16px;color:var(--t-body);margin-bottom:32px;max-width:420px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:32px}
.trust-badges{display:flex;gap:12px;flex-wrap:wrap}
.trust-badges span{background:rgba(55,230,201,0.08);border:1px solid rgba(55,230,201,0.25);color:var(--accent);border-radius:999px;padding:6px 16px;font-size:12px;display:inline-flex;align-items:center;gap:6px}
.trust-badges span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
.hero-visual{flex:1 1 45%;max-width:45%;position:relative}
.hero-frame{position:relative;border-radius:var(--r-hero);border:1px solid var(--glass-border);background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);overflow:hidden;aspect-ratio:4/3;box-shadow:var(--shadow-card)}
.hero-frame img{width:100%;height:100%;object-fit:cover}
.hero-frame .hero-overlay{position:absolute;inset:0;background:rgba(5,10,20,0.35)}
.hero-data-card{position:absolute;bottom:16px;right:16px;background:rgba(16,30,55,0.8);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:12px;padding:12px 20px;display:flex;flex-direction:column;gap:2px}
.hero-data-card .data-label{font-size:11px;color:var(--t-muted)}
.hero-data-card .data-value{font-size:14px;font-weight:600;color:var(--accent)}
.hero-ring{position:absolute;top:-24px;right:-24px;width:120px;height:120px;border:1px solid var(--accent);border-radius:50%;opacity:0.4;animation:spin 12s linear infinite;pointer-events:none}
@keyframes spin{to{transform:rotate(360deg)}}
.scroll-hint{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);color:var(--t-muted);font-size:20px;animation:bounce 2s infinite;cursor:pointer}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}
/* 痛点区 */
.pain-points{padding:100px 0}
.pain-grid{display:flex;gap:60px;align-items:flex-start}
.pain-left{flex:1 1 55%}
.pain-question{font-size:20px;font-weight:600;color:var(--t-title);padding:20px 0;border-bottom:1px solid rgba(255,255,255,0.08);display:flex;gap:12px;align-items:center}
.pain-question:first-child{padding-top:0}
.pain-question::before{content:"?";display:inline-flex;width:24px;height:24px;border-radius:50%;background:rgba(30,90,255,0.15);color:var(--primary);font-size:13px;font-weight:700;align-items:center;justify-content:center;flex-shrink:0}
.pain-right{flex:1 1 45%;background:var(--surface);border-radius:var(--r-card);padding:40px;border:1px solid rgba(255,255,255,0.06)}
.pain-right p{font-size:17px;line-height:1.8;color:var(--t-title);margin-bottom:20px}
.pain-right .link-more{color:var(--accent);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:8px}
.pain-right .link-more:hover{text-decoration:underline}
/* 方案卡片 */
.solutions{padding:40px 0 100px}
.solutions-title{font-size:28px;font-weight:700;color:var(--t-title);margin-bottom:40px}
.solutions-grid{display:flex;gap:24px;align-items:stretch}
.solution-card-lg{flex:1 1 55%;border-radius:var(--r-card);border:1px solid var(--glass-border);background:var(--glass);backdrop-filter:blur(14px);overflow:hidden;transition:transform .3s,border-color .3s,box-shadow .3s;display:flex;flex-direction:column}
.solution-card-lg:hover{transform:translateY(-4px);border-color:rgba(55,230,201,0.4);box-shadow:0 12px 36px rgba(30,90,255,0.18)}
.solution-card-img{height:200px;overflow:hidden;position:relative}
.solution-card-img img{width:100%;height:100%;object-fit:cover}
.solution-card-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(5,10,20,0.6))}
.solution-card-body{padding:28px;flex:1;display:flex;flex-direction:column}
.solution-card-body h3{font-size:20px;font-weight:600;color:var(--t-title);margin-bottom:8px}
.solution-card-body p{font-size:14px;color:var(--t-body);line-height:1.6;margin-bottom:20px;flex:1}
.solution-link{color:var(--accent);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;align-self:flex-start}
.solution-link:hover{text-decoration:underline}
.solution-col{flex:1 1 45%;display:flex;flex-direction:column;gap:24px}
.solution-card-sm{border-radius:var(--r-card);border:1px solid var(--glass-border);background:var(--glass);backdrop-filter:blur(14px);padding:28px;transition:transform .3s,border-color .3s,box-shadow .3s;flex:1;display:flex;flex-direction:column}
.solution-card-sm:hover{transform:translateY(-4px);border-color:rgba(55,230,201,0.4);box-shadow:0 12px 36px rgba(30,90,255,0.18)}
.solution-card-sm h3{font-size:18px;font-weight:600;color:var(--t-title);margin-bottom:8px}
.solution-card-sm p{font-size:14px;color:var(--t-body);line-height:1.6;margin-bottom:16px;flex:1}
/* 数据区 */
.stats-wrap{padding:80px 0;background:radial-gradient(ellipse at center,rgba(30,90,255,0.08),transparent 70%)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item{padding:24px 12px}
.stat-number{font-family:Georgia,serif;font-size:40px;font-weight:700;color:var(--t-title);letter-spacing:0.02em}
.stat-number span{color:var(--accent)}
.stat-under{margin:10px auto;width:40px;height:2px;background:var(--accent);border-radius:2px}
.stat-label{font-size:14px;color:var(--t-muted);margin-top:8px}
/* 召唤条 */
.contact-banner{padding:80px 0}
.contact-banner-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;background:var(--glass);backdrop-filter:blur(14px);border:1px solid var(--glass-border);border-radius:var(--r-hero);padding:48px}
.contact-banner-text{font-size:18px;font-weight:600;color:var(--t-title)}
.contact-banner-sub{font-size:14px;color:var(--t-muted);margin-top:4px}
/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(5,10,20,0.7);backdrop-filter:blur(8px);z-index:200;display:none;align-items:center;justify-content:center;padding:16px}
.modal-overlay.active{display:flex}
.modal-card{width:520px;max-width:100%;background:var(--surface);border-radius:20px;border:1px solid var(--glass-border);padding:40px;position:relative;box-shadow:0 24px 64px rgba(0,0,0,0.5)}
.modal-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--t-muted);font-size:18px;background:rgba(255,255,255,0.05)}
.modal-close:hover{color:var(--t-title);background:rgba(255,255,255,0.1)}
.modal-card h3{font-size:22px;font-weight:700;color:var(--t-title);margin-bottom:8px}
.modal-card .modal-desc{font-size:14px;color:var(--t-muted);margin-bottom:24px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;color:var(--t-body);margin-bottom:6px;font-weight:500}
.form-group input,.form-group select{width:100%;height:44px;background:var(--bg);border:1px solid #24385A;border-radius:10px;padding:0 14px;color:var(--t-title);font-size:14px;transition:border-color .2s,box-shadow .2s}
.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(55,230,201,0.15)}
.modal-submit{width:100%;height:44px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));box-shadow:var(--shadow-glow);color:#fff;font-size:15px;font-weight:600;margin-top:8px;transition:filter .2s,transform .15s}
.modal-submit:hover{filter:brightness(1.12)}
.modal-submit:active{transform:scale(0.98)}
.modal-privacy{font-size:12px;color:var(--t-muted);text-align:center;margin-top:12px}
.modal-secure{display:flex;align-items:center;justify-content:center;gap:6px;font-size:12px;color:var(--t-muted);margin-top:12px;padding-top:12px;border-top:1px solid rgba(255,255,255,0.05)}
.modal-secure .lock-icon{color:var(--accent)}
/* 隐私 */
.privacy-wrap{padding:80px 0}
.privacy-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.privacy-card{background:var(--surface);border-radius:var(--r-card);padding:32px;border:1px solid rgba(255,255,255,0.06)}
.privacy-card-title{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:600;color:var(--t-title);margin-bottom:16px}
.privacy-card-title .icon{width:36px;height:36px;border-radius:10px;background:rgba(255,176,46,0.1);display:flex;align-items:center;justify-content:center;font-size:16px}
.privacy-list{list-style:none}
.privacy-list li{font-size:14px;color:var(--t-body);padding:8px 0;border-bottom:1px solid rgba(255,255,255,0.04);display:flex;gap:8px;align-items:center}
.privacy-list li:last-child{border-bottom:none}
.privacy-list li::before{content:"✓";color:var(--accent);font-size:13px;flex-shrink:0}
/* 资讯列表 */
.news-wrap{padding:80px 0}
.news-title{font-size:28px;font-weight:700;color:var(--t-title);margin-bottom:8px}
.news-sub{font-size:14px;color:var(--t-muted);margin-bottom:32px}
.news-list{background:var(--surface);border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(255,255,255,0.06)}
.news-row{display:flex;align-items:center;gap:24px;padding:20px 28px;border-bottom:1px solid rgba(255,255,255,0.04);transition:background .2s;position:relative;min-height:92px}
.news-row:last-child{border-bottom:none}
.news-row:hover{background:rgba(30,90,255,0.03)}
.news-row:hover .news-arrow{transform:translateX(4px);color:var(--accent)}
.news-row::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);opacity:0;transition:opacity .2s}
.news-row:hover::before{opacity:1}
.news-date{width:60px;font-size:13px;color:var(--t-muted);flex-shrink:0;font-variant-numeric:tabular-nums}
.news-cat{background:rgba(30,90,255,0.1);color:var(--primary);border-radius:999px;padding:4px 12px;font-size:12px;flex-shrink:0}
.news-main{flex:1;min-width:0}
.news-main .news-title-text{font-size:15px;font-weight:600;color:var(--t-title);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.news-main .news-summary{font-size:13px;color:var(--t-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;margin-top:2px}
.news-arrow{flex-shrink:0;color:var(--t-muted);font-size:18px;transition:transform .2s,color .2s}
.news-empty{padding:64px 24px;text-align:center}
.news-empty p{color:var(--t-muted);margin-bottom:16px}
.news-empty a{color:var(--accent);font-size:14px;font-weight:600}
.news-empty a:hover{text-decoration:underline}
/* FAQ */
.faq-wrap{padding:80px 0}
.faq-title{font-size:28px;font-weight:700;color:var(--t-title);margin-bottom:40px;text-align:center}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{border-bottom:1px solid rgba(255,255,255,0.06)}
.faq-question{width:100%;padding:20px 0;display:flex;justify-content:space-between;align-items:center;text-align:left;font-size:16px;font-weight:600;color:var(--t-title);transition:color .2s}
.faq-question:hover{color:var(--accent)}
.faq-question .arrow{transition:transform .2s;color:var(--t-muted);font-size:18px}
.faq-item.active .faq-question{color:var(--accent)}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-item.active .faq-question::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px 0 0}
.faq-answer p{font-size:14px;line-height:1.7;color:var(--t-body);padding-bottom:20px;padding-left:20px;border-left:2px solid rgba(55,230,201,0.2)}
.faq-item.active .faq-answer{max-height:400px}
/* 底部CTA */
.bottom-cta{padding:40px 0 80px}
.cta-banner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;background:linear-gradient(135deg,rgba(30,90,255,0.15),rgba(10,20,36,0.9));backdrop-filter:blur(14px);border:1px solid var(--glass-border);border-radius:var(--r-hero);padding:48px;overflow:hidden}
.cta-banner::before{content:"";position:absolute;top:-30px;right:80px;width:160px;height:160px;border:1px solid rgba(55,230,201,0.2);border-radius:50%}
.cta-banner-text{font-size:20px;font-weight:700;color:var(--t-title)}
.cta-banner-sub{font-size:14px;color:var(--t-muted);margin-top:4px}
/* 页脚 */
.site-footer{background:#02040A;padding:64px 0 0;margin-top:40px;position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--primary),transparent)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;padding-bottom:48px}
.footer-brand .footer-logo{font-size:20px;font-weight:800;color:var(--t-title)}
.footer-brand .footer-logo span{color:var(--accent)}
.footer-brand p{font-size:14px;color:var(--t-muted);margin-top:12px;max-width:260px}
.footer-brand a.email{display:inline-block;margin-top:12px;font-size:13px;color:var(--t-body)}
.footer-brand a.email:hover{color:var(--accent)}
.footer-col-title{font-size:16px;font-weight:600;color:var(--t-title);margin-bottom:16px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:var(--t-muted);transition:color .2s}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:24px 0;border-top:1px solid rgba(255,255,255,0.04);font-size:13px;color:var(--t-muted);flex-wrap:wrap;gap:12px}
.footer-bottom a{color:var(--t-muted)}
.footer-bottom a:hover{color:var(--accent)}
/* 响应式 */
@media(max-width:1024px){
.hero{min-height:auto;padding:100px 0 60px}
.hero-inner{flex-direction:column;gap:32px}
.hero-content{max-width:100%}
.hero-visual{max-width:100%;width:100%}
.hero-frame{aspect-ratio:16/9}
.pain-grid{flex-direction:column;gap:40px}
.solutions-grid{flex-direction:column}
.solution-card-lg,.solution-col{flex:1 1 auto}
.stats-grid{grid-template-columns:repeat(2,1fr)}
.contact-banner-inner{flex-direction:column;text-align:center;padding:32px}
.cta-banner{flex-direction:column;text-align:center;padding:32px}
.footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
.header-left .main-nav{display:none}
.menu-toggle{display:flex}
.site-header scrolled .main-nav{}
.main-nav.mobile-open{display:flex;position:fixed;top:64px;left:0;right:0;background:rgba(5,10,20,0.95);backdrop-filter:blur(12px);flex-direction:column;padding:24px;gap:20px;border-bottom:1px solid rgba(255,255,255,0.08);z-index:99}
.nav-link{font-size:18px;padding:12px 0}
.hero .container{padding:0 16px}
.pain-question{font-size:18px}
.privacy-grid{grid-template-columns:1fr}
.stack-card{padding:24px}
.news-row{flex-wrap:wrap;gap:12px;padding:16px 20px}
.news-date{width:auto;font-size:12px}
.news-main .news-summary{display:none}
.footer-grid{grid-template-columns:1fr}
.footer-bottom{flex-direction:column;text-align:center}
}
@media(max-width:640px){
.container{padding:0 16px}
.stats-grid{grid-template-columns:1fr 1fr;gap:16px}
.stat-number{font-size:32px}
.hero-actions{flex-direction:column}
.hero-actions .btn{width:100%}
.trust-badges{flex-wrap:wrap}
.trust-badges span{width:100%;justify-content:center}
.solution-card-body{padding:20px}
.modal-card{padding:24px}
.contact-banner-inner,.cta-banner{padding:24px}
.footer-bottom{flex-direction:column;align-items:center}
}

/* roulang page: category1 */
:root {
            --primary: #1E5AFF;
            --primary-dark: #1244CC;
            --accent: #37E6C9;
            --warning: #FFB02E;
            --bg-base: #050A14;
            --bg-surface: #0A1424;
            --glass-bg: rgba(16, 30, 55, 0.55);
            --glass-border: rgba(255, 255, 255, 0.10);
            --text-title: #EEF5FF;
            --text-body: #B7C4E0;
            --text-weak: #7186A8;
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-hero: 20px;
            --shadow-card: 0 8px 24px rgba(0,0,0,0.35);
            --shadow-glow: 0 0 20px rgba(30,90,255,0.45), 0 0 48px rgba(55,230,201,0.18);
        }
        
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            background: var(--bg-base);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image: linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
            background-size: 64px 64px;
            pointer-events: none;
            z-index: 0;
        }
        body::after {
            content: '';
            position: fixed;
            top: 0;
            right: 0;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(30,90,255,0.12) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }
        
        img { max-width: 100%; display: block; }
        a { text-decoration: none; color: inherit; }
        button { font-family: inherit; }
        
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: 64px;
            z-index: 100;
            background: rgba(5, 10, 20, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255,255,255,0.05);
            transition: all 0.3s;
        }
        .site-header.scrolled {
            background: rgba(5,10,20,0.92);
            box-shadow: 0 4px 20px rgba(0,0,0,0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-title);
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: -0.5px;
        }
        .logo span { color: var(--accent); }
        
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: 48px;
        }
        .nav-link {
            color: var(--text-body);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
            transition: color 0.2s;
            white-space: nowrap;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-link:hover { color: var(--text-title); }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0;
            width: 100%; height: 2px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s;
        }
        .nav-link:hover::after { transform: scaleX(1); }
        .nav-link.active { color: var(--text-title); font-weight: 600; }
        .nav-link.active::after { transform: scaleX(1); background: var(--primary); }
        
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.2s;
            box-shadow: 0 0 16px rgba(30,90,255,0.3);
            white-space: nowrap;
        }
        .nav-cta:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow);
        }
        .nav-cta:active { transform: scale(0.98); }
        
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-title);
            cursor: pointer;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
        }
        
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px; left: 0; right: 0;
            background: rgba(5,10,20,0.95);
            backdrop-filter: blur(12px);
            z-index: 99;
            padding: 12px 16px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu .nav-link {
            display: block;
            padding: 14px 12px;
            font-size: 16px;
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }
        .mobile-menu .nav-link:last-child { border-bottom: none; }
        
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: all 0.2s;
            box-shadow: 0 0 20px rgba(30,90,255,0.35);
            min-height: 44px;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .btn-primary:active { transform: scale(0.98); }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1px solid rgba(255,255,255,0.2);
            color: var(--text-title);
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            text-decoration: none;
            transition: all 0.2s;
            background: transparent;
            min-height: 44px;
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 0 16px rgba(55,230,201,0.12);
        }
        .btn-outline:active { transform: scale(0.98); }
        .btn-outline:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(30,90,255,0.12);
            color: #8FB0FF;
            border: 1px solid rgba(30,90,255,0.25);
            white-space: nowrap;
        }
        .badge-accent {
            background: rgba(55,230,201,0.10);
            color: var(--accent);
            border-color: rgba(55,230,201,0.25);
        }
        
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all 0.3s;
        }
        .glass-card:hover {
            border-color: rgba(255,255,255,0.18);
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(30,90,255,0.18);
        }
        
        .surface-card {
            background: var(--bg-surface);
            border: 1px solid rgba(255,255,255,0.05);
            border-radius: var(--radius-card);
            transition: all 0.3s;
        }
        .surface-card:hover {
            border-color: rgba(255,255,255,0.1);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.25);
        }
        
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-sub {
            font-size: 15px;
            color: var(--text-weak);
            margin-bottom: 32px;
        }
        
        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        .ring-spin { animation: spin 20s linear infinite; }
        
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-up { animation: fadeUp 0.8s ease-out both; }
        
        .stat-num {
            font-family: Georgia, 'Times New Roman', serif;
            font-size: 42px;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.1;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-weak);
            margin-top: 8px;
        }
        .stat-bar {
            width: 40px;
            height: 2px;
            background: var(--accent);
            margin-top: 10px;
        }
        
        .faq-item {
            background: var(--bg-surface);
            border: 1px solid rgba(255,255,255,0.05);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: color 0.2s;
        }
        .faq-question:hover { color: var(--accent); }
        .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform 0.25s;
            color: var(--accent);
            font-size: 14px;
        }
        .faq-item.active .faq-icon { transform: rotate(45deg); }
        .faq-answer {
            display: none;
            padding: 0 24px 18px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-body);
        }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active { border-color: rgba(55,230,201,0.25); }
        
        .site-footer {
            background: #02040A;
            border-top: 1px solid rgba(255,255,255,0.05);
            position: relative;
            z-index: 1;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(30,90,255,0.5), transparent);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding: 48px 0 32px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-title);
            margin-bottom: 12px;
        }
        .footer-logo span { color: var(--accent); }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 16px;
            line-height: 1.6;
            max-width: 320px;
        }
        .footer-brand .email {
            color: var(--accent);
            text-decoration: none;
            font-size: 14px;
            transition: opacity 0.2s;
        }
        .footer-brand .email:hover { opacity: 0.8; }
        .footer-col-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a {
            color: var(--text-weak);
            text-decoration: none;
            font-size: 13px;
            transition: color 0.2s;
        }
        .footer-links a:hover { color: var(--accent); }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            border-top: 1px solid rgba(255,255,255,0.05);
            font-size: 12px;
            color: var(--text-weak);
        }
        .footer-bottom a {
            color: var(--text-weak);
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-bottom a:hover { color: var(--accent); }
        
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            padding: 20px 0 0;
        }
        .breadcrumb a {
            color: var(--text-weak);
            text-decoration: none;
            transition: color 0.2s;
        }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: rgba(255,255,255,0.2); }
        .breadcrumb .current { color: var(--text-body); }
        
        .hero-visual {
            position: relative;
            border-radius: var(--radius-hero);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: 0 16px 48px rgba(0,0,0,0.5);
        }
        .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(5,10,20,0.45), transparent 55%);
            pointer-events: none;
        }
        
        @media (max-width: 1024px) {
            .main-nav { gap: 20px; margin-left: 24px; }
            .footer-grid { gap: 32px; }
        }
        
        @media (max-width: 768px) {
            .main-nav { display: none; }
            .nav-toggle { display: inline-flex; }
            .nav-cta { display: none; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; padding: 36px 0 24px; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
            .container { padding: 0 16px; }
            .section-title { font-size: 26px; }
        }
        
        @media (max-width: 640px) {
            body { font-size: 14px; }
            .stat-num { font-size: 32px; }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1424;
            --glass-bg: rgba(16, 30, 55, 0.55);
            --glass-border: rgba(255, 255, 255, 0.10);
            --primary: #1E5AFF;
            --primary-dark: #1244CC;
            --accent: #37E6C9;
            --warn: #FFB02E;
            --text-heading: #EEF5FF;
            --text-body: #B7C4E0;
            --text-weak: #7186A8;
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-hero: 20px;
            --glow-btn: 0 0 20px rgba(30, 90, 255, 0.45), 0 0 48px rgba(55, 230, 201, 0.18);
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 36px rgba(30, 90, 255, 0.18);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            background: var(--bg-deep);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 15px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 64px 64px;
            pointer-events: none;
            z-index: 0;
        }

        body::after {
            content: '';
            position: fixed;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(30, 90, 255, 0.12), transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
            position: relative;
            z-index: 1;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            background: rgba(5, 10, 20, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: background .3s ease;
        }

        .site-header.scrolled {
            background: rgba(5, 10, 20, 0.92);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-heading);
            white-space: nowrap;
            letter-spacing: -0.2px;
            line-height: 1.2;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin-left: 16px;
            flex: 1;
        }

        .nav-link {
            font-size: 14px;
            color: var(--text-body);
            position: relative;
            padding: 8px 2px;
            transition: color .2s ease;
            white-space: nowrap;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--text-heading);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(0.6);
            transition: all .25s ease;
        }

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

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: none;
            border-radius: 8px;
            transition: background .2s;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .menu-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all .2s ease;
        }

        .menu-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .menu-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            border: 1px solid transparent;
            transition: all .2s ease;
            white-space: nowrap;
            min-height: 44px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            filter: brightness(1.12);
            box-shadow: 0 0 28px rgba(30, 90, 255, 0.55);
        }

        .btn-accent {
            background: var(--accent);
            color: #04121C;
            border-color: var(--accent);
        }

        .btn-accent:hover {
            background: #4ff4d8;
            filter: brightness(1.05);
            box-shadow: 0 0 28px rgba(55, 230, 201, 0.4);
        }

        .btn-ghost {
            background: transparent;
            color: var(--text-heading);
            border-color: rgba(255, 255, 255, 0.18);
        }

        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .btn-glow {
            box-shadow: var(--glow-btn);
        }

        .btn-glow:active,
        .btn:active {
            transform: scale(0.98);
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .menu-toggle:focus-visible,
        .faq-q:focus-visible,
        .entry-item:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            min-height: 40px;
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }

        .badge-accent {
            background: rgba(55, 230, 201, 0.12);
            color: var(--accent);
            border: 1px solid rgba(55, 230, 201, 0.3);
        }

        .trust-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 12px;
            color: var(--text-body);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            line-height: 1.4;
        }

        /* ===== Section ===== */
        .section {
            padding: 100px 0;
            position: relative;
            z-index: 1;
        }

        .section-alt {
            background: linear-gradient(180deg, rgba(10, 20, 36, 0.4), rgba(5, 10, 20, 0.8));
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .section-head {
            max-width: 640px;
            margin-bottom: 56px;
        }

        .section-kicker {
            display: flex;
            align-items: center;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-kicker::before {
            content: '';
            width: 4px;
            height: 4px;
            background: var(--accent);
            display: inline-block;
            margin-right: 8px;
            vertical-align: middle;
            border-radius: 50%;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-body);
            max-width: 520px;
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            padding: 72px 0 80px;
            position: relative;
            z-index: 1;
        }

        .cat-hero-inner {
            display: grid;
            grid-template-columns: 55fr 45fr;
            gap: 56px;
            align-items: center;
        }

        .cat-hero-content h1 {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.2;
            margin: 18px 0 16px;
            letter-spacing: -0.5px;
        }

        .cat-hero-content h1 span {
            color: var(--accent);
        }

        .cat-hero-desc {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.8;
            max-width: 480px;
            margin-bottom: 28px;
        }

        .cat-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .cat-hero-trust {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .cat-hero-visual {
            position: relative;
        }

        .cat-hero-img-wrap {
            position: relative;
            border-radius: var(--radius-hero);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            border: 1px solid var(--glass-border);
            background: linear-gradient(135deg, rgba(10, 20, 36, 0.9), rgba(30, 90, 255, 0.15), rgba(5, 10, 20, 0.9));
            box-shadow: var(--shadow-card);
        }

        .cat-hero-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: relative;
            z-index: 0;
        }

        .img-overlay {
            position: absolute;
            inset: 0;
            background: rgba(5, 10, 20, 0.35);
            z-index: 1;
            pointer-events: none;
        }

        .glass-data-card {
            position: absolute;
            right: 20px;
            bottom: 20px;
            z-index: 2;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: 14px;
            padding: 14px 20px;
            display: flex;
            flex-direction: column;
            min-width: 150px;
            box-shadow: var(--shadow-card);
        }

        .glass-data-num {
            font-family: Georgia, serif;
            font-size: 24px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.2;
        }

        .glass-data-label {
            font-size: 12px;
            color: var(--text-weak);
            margin-top: 4px;
        }

        .hero-ring {
            position: absolute;
            width: 220px;
            height: 220px;
            border: 1px solid rgba(55, 230, 201, 0.3);
            border-radius: 50%;
            top: -30px;
            right: -40px;
            animation: spin 24s linear infinite;
            pointer-events: none;
            z-index: 0;
        }

        .hero-ring::after {
            content: '';
            position: absolute;
            top: 50%;
            left: -4px;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 12px rgba(55, 230, 201, 0.8);
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        /* ===== Feature Grid ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 24px;
            grid-template-rows: auto auto;
        }

        .feature-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: all .3s ease;
            box-shadow: var(--shadow-card);
            min-height: 200px;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.22);
            box-shadow: var(--shadow-card-hover);
        }

        .feature-card-lg {
            grid-row: span 2;
            padding: 0;
            overflow: hidden;
            min-height: 0;
        }

        .feature-card-lg .feature-card-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }

        .feature-card-lg .feature-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .feature-card-lg:hover .feature-card-img img {
            transform: scale(1.03);
        }

        .feature-card-lg .feature-card-body {
            padding: 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .text-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s ease;
        }

        .text-link:hover {
            color: var(--accent);
            gap: 10px;
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        /* ===== Scenario ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: 2fr 3fr;
            gap: 56px;
            align-items: start;
        }

        .scenario-intro h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .scenario-intro p {
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 360px;
        }

        .scenario-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.07);
            padding: 8px 24px;
        }

        .scenario-item {
            display: flex;
            gap: 20px;
            padding: 24px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            align-items: flex-start;
            transition: background .2s;
        }

        .scenario-item:last-child {
            border-bottom: none;
        }

        .scenario-item:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .scenario-num {
            font-family: Georgia, serif;
            font-size: 28px;
            font-weight: 700;
            color: rgba(55, 230, 201, 0.4);
            line-height: 1.2;
            min-width: 44px;
        }

        .scenario-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .scenario-item p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

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

        .process-step {
            background: var(--bg-surface);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            position: relative;
            transition: all .3s ease;
        }

        .process-step:hover {
            border-color: rgba(55, 230, 201, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .process-num {
            font-family: Georgia, serif;
            font-size: 36px;
            font-weight: 700;
            color: rgba(30, 90, 255, 0.35);
            display: block;
            margin-bottom: 16px;
            line-height: 1;
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.65;
        }

        /* ===== Entry List ===== */
        .entry-list {
            display: flex;
            flex-direction: column;
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.07);
            overflow: hidden;
        }

        .entry-item {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 24px 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: all .25s ease;
            position: relative;
            min-height: 92px;
        }

        .entry-item:last-child {
            border-bottom: none;
        }

        .entry-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity .25s ease;
            border-radius: 0 3px 3px 0;
        }

        .entry-item:hover::before {
            opacity: 1;
        }

        .entry-item:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .entry-num {
            font-family: Georgia, serif;
            font-size: 30px;
            font-weight: 700;
            color: rgba(55, 230, 201, 0.4);
            min-width: 52px;
            line-height: 1.2;
        }

        .entry-body {
            flex: 1;
        }

        .entry-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .entry-body p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.65;
            max-width: 720px;
        }

        .entry-arrow {
            font-size: 20px;
            color: var(--text-weak);
            transition: all .25s ease;
            padding: 8px;
        }

        .entry-item:hover .entry-arrow {
            color: var(--accent);
            transform: translateX(4px);
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            display: grid;
            grid-template-columns: 2fr 3fr;
            gap: 56px;
            align-items: start;
        }

        .faq-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .faq-head p {
            color: var(--text-body);
            font-size: 14px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-surface);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color .2s ease;
        }

        .faq-item.open {
            border-color: rgba(55, 230, 201, 0.3);
        }

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            text-align: left;
            background: transparent;
            border: none;
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.5;
            transition: background .2s;
            min-height: 60px;
        }

        .faq-q:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-icon {
            position: relative;
            width: 18px;
            height: 18px;
            flex-shrink: 0;
            transition: transform .2s ease;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--accent);
            border-radius: 2px;
            transition: all .2s ease;
        }

        .faq-icon::before {
            top: 8px;
            left: 0;
            width: 18px;
            height: 2px;
        }

        .faq-icon::after {
            top: 0;
            left: 8px;
            width: 2px;
            height: 18px;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }

        .faq-item.open .faq-a {
            max-height: 300px;
        }

        .faq-a p {
            padding: 0 24px 24px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-banner {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-hero);
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
        }

        .cta-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .cta-text p {
            font-size: 15px;
            color: var(--text-body);
            max-width: 480px;
        }

        /* ===== Bottom Links ===== */
        .cat-bottom-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            padding: 32px 0 80px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: 80px;
        }

        .cat-bottom-links .sep {
            color: var(--text-weak);
            font-size: 14px;
            padding: 0 8px;
        }

        .cat-bottom-links a:not(.btn) {
            color: var(--text-body);
            font-size: 14px;
            padding: 10px 4px;
            border-bottom: 1px solid transparent;
        }

        .cat-bottom-links a:not(.btn):hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #02040A;
            border-top: 1px solid transparent;
            position: relative;
            z-index: 1;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding: 56px 0 40px;
        }

        .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-heading);
            margin-bottom: 14px;
        }

        .footer-logo span {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 300px;
        }

        .footer-brand .email {
            font-size: 14px;
            color: var(--text-body);
            border-bottom: 1px solid transparent;
        }

        .footer-brand .email:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        .footer-col-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-body);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer-bottom a {
            color: var(--text-weak);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 80px 0;
            }

            .cat-hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .cat-hero-content {
                max-width: 100%;
            }

            .cat-hero-visual {
                max-width: 640px;
            }

            .cat-hero-img-wrap {
                aspect-ratio: 16 / 10;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .faq-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .feature-card-lg {
                grid-row: auto;
            }
        }

        @media (max-width: 767px) {
            .section {
                padding: 64px 0;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(5, 10, 20, 0.97);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 24px 24px 40px;
                transform: translateY(-120%);
                transition: transform .3s ease;
                z-index: 99;
                margin-left: 0;
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
                overflow-y: auto;
                max-height: calc(100vh - 64px);
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .nav-link {
                font-size: 18px;
                padding: 16px 0;
                display: block;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                min-height: 52px;
                line-height: 1.4;
            }

            .nav-link:last-child {
                border-bottom: none;
            }

            .nav-link::after {
                display: none;
            }

            .nav-side {
                gap: 8px;
            }

            .nav-side .btn {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .cat-hero {
                padding: 48px 0 56px;
            }

            .cat-hero-content h1 {
                font-size: 32px;
            }

            .cat-hero-desc {
                font-size: 15px;
            }

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

            .cat-hero-actions .btn {
                width: 100%;
            }

            .cat-hero-trust {
                gap: 8px;
            }

            .hero-ring {
                width: 140px;
                height: 140px;
                top: -20px;
                right: -20px;
            }

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

            .feature-card {
                min-height: 0;
                padding: 24px;
            }

            .feature-card-lg .feature-card-img {
                height: 180px;
            }

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

            .process-step {
                padding: 24px;
            }

            .entry-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 20px;
                min-height: 0;
            }

            .entry-num {
                font-size: 24px;
                min-width: 40px;
            }

            .entry-body {
                flex-basis: calc(100% - 60px);
            }

            .entry-body h3 {
                font-size: 16px;
            }

            .entry-body p {
                font-size: 13px;
            }

            .entry-arrow {
                margin-left: auto;
                padding: 0 4px;
            }

            .faq-q {
                padding: 18px 20px;
                font-size: 15px;
            }

            .faq-a p {
                padding: 0 20px 20px;
                font-size: 13px;
            }

            .cta-banner {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }

            .cta-banner .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
                padding: 44px 0 32px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .cat-bottom-links {
                padding: 24px 0 56px;
                margin-top: 56px;
                gap: 10px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category3 */
:root {
    --bg-deep: #050A14;
    --bg-surface: #0A1424;
    --glass-bg: rgba(16, 30, 55, 0.55);
    --glass-border: rgba(255, 255, 255, 0.10);
    --primary: #1E5AFF;
    --primary-dark: #1244CC;
    --accent: #37E6C9;
    --warning: #FFB02E;
    --text-title: #EEF5FF;
    --text-body: #B7C4E0;
    --text-weak: #7186A8;
    --radius-card: 14px;
    --radius-btn: 10px;
    --radius-hero: 20px;
    --shadow-card: 0 8px 24px rgba(0,0,0,0.35);
    --shadow-hover: 0 12px 36px rgba(30,90,255,0.18);
    --glow-btn: 0 0 20px rgba(30, 90, 255, 0.45), 0 0 48px rgba(55, 230, 201, 0.18);
    --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-family);
    background-color: var(--bg-deep);
    background-image:
      linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
      radial-gradient(circle at 82% 18%, rgba(30, 90, 255, 0.12), transparent 42%);
    background-size: 64px 64px, 64px 64px, 100% 100%;
    background-attachment: fixed;
    color: var(--text-body);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

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

  a {
    color: inherit;
    text-decoration: none;
    transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
  }

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

  input,
  select {
    font-family: inherit;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }

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

  /* ===== Header & Nav ===== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 64px;
    background: transparent;
    transition: background 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
  }

  .site-header.header-scrolled {
    background: rgba(5, 10, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }

  .header-left {
    display: flex;
    align-items: center;
    gap: 40px;
  }

  .site-logo {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-title);
    letter-spacing: 0.5px;
    white-space: nowrap;
    line-height: 1.2;
  }

  .site-logo span {
    color: var(--accent);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
  }

  .nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-body);
    position: relative;
    padding: 6px 2px;
    white-space: nowrap;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s ease;
  }

  .nav-link:hover {
    color: var(--text-title);
  }

  .nav-link:hover::after {
    width: 100%;
  }

  .nav-link.active {
    color: var(--text-title);
  }

  .nav-link.active::after {
    width: 100%;
  }

  .header-right {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    padding: 0 9px;
  }

  .nav-toggle span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: var(--text-title);
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  @media (max-width: 768px) {
    .main-nav {
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      flex-direction: column;
      align-items: flex-start;
      background: rgba(5, 10, 20, 0.97);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      padding: 24px 24px 36px;
      gap: 10px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      transform: translateY(-16px);
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .main-nav.open {
      transform: translateY(0);
      opacity: 1;
      pointer-events: auto;
    }

    .nav-link {
      font-size: 17px;
      padding: 10px 0;
      width: 100%;
    }

    .nav-toggle {
      display: flex;
    }
  }

  @media (max-width: 1024px) {
    .header-left {
      gap: 24px;
    }
  }

  /* ===== Buttons ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-btn);
    border: none;
    line-height: 1.4;
    transition: filter 0.25s ease, box-shadow 0.25s ease, transform 0.15s ease, border-color 0.25s ease, background 0.25s ease;
    white-space: nowrap;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--glow-btn);
    padding: 12px 28px;
  }

  .btn-primary:hover {
    filter: brightness(1.12);
    box-shadow: 0 0 28px rgba(30, 90, 255, 0.55), 0 0 56px rgba(55, 230, 201, 0.24);
  }

  .btn-primary:active {
    transform: scale(0.98);
  }

  .btn-primary:focus-visible,
  .btn-ghost:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
  }

  .btn-ghost {
    background: transparent;
    color: var(--text-title);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 11px 24px;
  }

  .btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(55, 230, 201, 0.06);
  }

  .btn-sm {
    padding: 8px 18px;
    font-size: 14px;
    border-radius: 8px;
  }

  .btn-pill {
    border-radius: 999px;
    padding: 10px 24px;
  }

  /* ===== Glass ===== */
  .glass {
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-hero);
  }

  /* ===== Hero ===== */
  .category-hero {
    padding: 140px 0 80px;
    min-height: 78vh;
    display: flex;
    align-items: center;
  }

  .category-hero .hero-grid {
    display: grid;
    grid-template-columns: 55% 45%;
    gap: 48px;
    align-items: center;
    width: 100%;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(30, 90, 255, 0.12);
    border: 1px solid rgba(30, 90, 255, 0.25);
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 20px;
  }

  .hero-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(55, 230, 201, 0.8);
  }

  .category-hero h1 {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    color: var(--text-title);
    line-height: 1.2;
    margin-bottom: 16px;
  }

  .category-hero h1 span {
    color: var(--accent);
  }

  .hero-sub {
    font-size: 17px;
    color: var(--text-body);
    max-width: 480px;
    margin-bottom: 28px;
  }

  .hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 28px;
  }

  .hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .trust-badge {
    font-size: 12px;
    color: var(--text-weak);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 4px 12px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .trust-badge i {
    color: var(--accent);
  }

  .hero-visual {
    position: relative;
  }

  .hero-visual::before {
    content: '';
    position: absolute;
    top: -18px;
    right: -18px;
    width: 84px;
    height: 84px;
    border: 1px solid rgba(55, 230, 201, 0.45);
    border-radius: 50%;
    animation: spin 22s linear infinite;
    pointer-events: none;
  }

  @keyframes spin {
    to {
      transform: rotate(360deg);
    }
  }

  .hero-image-wrap {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-hero);
    overflow: hidden;
    background: linear-gradient(135deg, #0A1424, #12244A, #0A1424);
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .hero-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .hero-image-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(5, 10, 20, 0.3);
  }

  .hero-data-card {
    position: absolute;
    right: 16px;
    bottom: 16px;
    z-index: 2;
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-card);
  }

  .hero-data-card .pulse {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px rgba(55, 230, 201, 0.7);
    flex-shrink: 0;
  }

  .hero-data-card .data-label {
    font-size: 12px;
    color: var(--text-weak);
    line-height: 1.3;
  }

  .hero-data-card .data-value {
    font-size: 12px;
    color: var(--text-title);
    font-weight: 600;
  }

  .scroll-indicator {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--text-weak);
    font-size: 12px;
  }

  .scroll-indicator .arrow {
    width: 10px;
    height: 10px;
    border-right: 1.5px solid var(--text-weak);
    border-bottom: 1.5px solid var(--text-weak);
    transform: rotate(45deg);
    animation: bounce 1.6s infinite;
  }

  @keyframes bounce {
    0%, 100% {
      transform: rotate(45deg) translate(0, 0);
    }
    50% {
      transform: rotate(45deg) translate(4px, 4px);
    }
  }

  @media (max-width: 1024px) {
    .category-hero {
      padding: 120px 0 60px;
      min-height: auto;
    }

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

    .scroll-indicator {
      display: none;
    }
  }

  /* ===== Section Titles ===== */
  .section-block {
    padding: 80px 0;
  }

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

  .section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 8px;
  }

  .section-kicker::before {
    content: '';
    width: 16px;
    height: 2px;
    background: var(--accent);
    display: inline-block;
  }

  .section-title {
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 700;
    color: var(--text-title);
    line-height: 1.3;
    margin: 0;
  }

  .section-desc {
    font-size: 15px;
    color: var(--text-weak);
    max-width: 360px;
  }

  @media (max-width: 768px) {
    .section-block {
      padding: 56px 0;
    }

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

  /* ===== Problem Index List ===== */
  .problem-list {
    background: var(--bg-surface);
    border-radius: var(--radius-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--shadow-card);
    overflow: hidden;
  }

  .problem-item {
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 18px 28px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background 0.25s ease, box-shadow 0.25s ease;
    position: relative;
    min-height: 92px;
  }

  .problem-item:last-child {
    border-bottom: none;
  }

  .problem-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    opacity: 0;
    transition: opacity 0.25s ease;
  }

  .problem-item:hover {
    background: rgba(30, 90, 255, 0.06);
  }

  .problem-item:hover::before {
    opacity: 1;
  }

  .problem-index {
    font-family: Georgia, serif;
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    width: 40px;
    flex-shrink: 0;
    letter-spacing: 0.5px;
  }

  .problem-body {
    flex: 1;
    min-width: 0;
  }

  .problem-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 4px;
    line-height: 1.4;
  }

  .problem-desc {
    font-size: 14px;
    color: var(--text-weak);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .problem-arrow {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-weak);
    font-size: 16px;
    flex-shrink: 0;
    transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
  }

  .problem-item:hover .problem-arrow {
    background: var(--primary);
    color: #fff;
    transform: translateX(4px);
  }

  @media (max-width: 640px) {
    .problem-item {
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
      padding: 18px 20px;
    }

    .problem-desc {
      white-space: normal;
    }

    .problem-arrow {
      position: absolute;
      right: 18px;
      top: 50%;
      transform: translateY(-50%);
    }

    .problem-item:hover .problem-arrow {
      transform: translateY(-50%) translateX(4px);
    }
  }

  /* ===== Process Timeline ===== */
  .process-section {
    position: relative;
    overflow: hidden;
  }

  .process-section::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    background: linear-gradient(to bottom, transparent, rgba(55, 230, 201, 0.3), rgba(30, 90, 255, 0.3), transparent);
    transform: translateX(-50%);
  }

  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    position: relative;
  }

  .process-step {
    text-align: left;
    padding: 28px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-card);
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  }

  .process-step:hover {
    border-color: rgba(55, 230, 201, 0.35);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
  }

  .process-step .step-num {
    font-family: Georgia, serif;
    font-size: 13px;
    color: var(--accent);
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }

  .process-step .step-num::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(55, 230, 201, 0.6);
  }

  .process-step h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 8px;
  }

  .process-step p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.6;
  }

  @media (max-width: 1024px) {
    .process-section::before {
      display: none;
    }

    .process-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 640px) {
    .process-grid {
      grid-template-columns: 1fr;
      gap: 16px;
    }
  }

  /* ===== FAQ Accordion ===== */
  .faq-wrap {
    max-width: 860px;
    margin: 0 auto;
  }

  .faq-item {
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: var(--bg-surface);
    border-radius: var(--radius-card);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color 0.3s ease;
  }

  .faq-item.active {
    border-color: rgba(55, 230, 201, 0.3);
  }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    text-align: left;
    background: transparent;
    border: none;
    padding: 22px 26px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-title);
    line-height: 1.5;
    transition: color 0.25s ease;
  }

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

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

  .faq-question::before {
    content: '';
    width: 3px;
    height: 18px;
    background: var(--accent);
    flex-shrink: 0;
    border-radius: 3px;
    opacity: 0;
    transition: opacity 0.25s ease;
  }

  .faq-item.active .faq-question::before {
    opacity: 1;
  }

  .faq-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    color: var(--text-weak);
    transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    font-size: 14px;
    font-style: normal;
  }

  .faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: var(--accent);
    border-color: var(--accent);
    color: #050A14;
  }

  .faq-answer {
    padding: 0 26px 22px 49px;
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.7;
    display: none;
  }

  .faq-item.active .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(-6px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @media (max-width: 640px) {
    .faq-question {
      padding: 18px 16px;
      font-size: 15px;
    }

    .faq-answer {
      padding: 0 16px 18px 34px;
    }
  }

  /* ===== Category Entry Cards ===== */
  .entry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .entry-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 28px;
    background: var(--bg-surface);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    min-height: 96px;
  }

  .entry-card:hover {
    border-color: rgba(30, 90, 255, 0.4);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
  }

  .entry-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 90, 255, 0.12);
    color: var(--accent);
    font-size: 20px;
    flex-shrink: 0;
  }

  .entry-info h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 4px;
  }

  .entry-info p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.5;
  }

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

  /* ===== CTA Banner ===== */
  .cta-banner {
    position: relative;
    padding: 56px 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    border-radius: 20px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(30, 90, 255, 0.22), rgba(16, 30, 55, 0.7), rgba(55, 230, 201, 0.12));
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .cta-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(55, 230, 201, 0.5), transparent);
  }

  .cta-banner h2 {
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 8px;
    line-height: 1.3;
  }

  .cta-banner p {
    font-size: 15px;
    color: var(--text-body);
  }

  @media (max-width: 768px) {
    .cta-banner {
      flex-direction: column;
      align-items: flex-start;
      padding: 32px 24px;
    }
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #02040A;
    border-top: 1px solid rgba(30, 90, 255, 0.15);
    margin-top: 80px;
  }

  .site-footer::before {
    content: '';
    display: block;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(55, 230, 201, 0.4), transparent);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    padding: 56px 0 36px;
  }

  .footer-logo {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-title);
    margin-bottom: 12px;
  }

  .footer-logo span {
    color: var(--accent);
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--text-weak);
    max-width: 320px;
    margin-bottom: 16px;
    line-height: 1.7;
  }

  .footer-brand .email {
    font-size: 14px;
    color: var(--text-body);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.25s ease;
  }

  .footer-brand .email:hover {
    color: var(--accent);
  }

  .footer-col-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 8px;
  }

  .footer-col-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
  }

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

  .footer-links a {
    font-size: 14px;
    color: var(--text-weak);
    transition: color 0.25s ease, padding-left 0.25s ease;
  }

  .footer-links a:hover {
    color: var(--accent);
    padding-left: 6px;
  }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 22px 0;
    font-size: 13px;
    color: var(--text-weak);
  }

  .footer-bottom a {
    color: var(--text-weak);
  }

  .footer-bottom a:hover {
    color: var(--accent);
  }

  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
      padding: 40px 0 28px;
    }

    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }
  }

  /* ===== Back to home pill ===== */
  .back-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
  }

  .back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-body);
    padding: 10px 22px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  }

  .back-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(55, 230, 201, 0.05);
  }

  /* ===== Focus visibility global ===== */
  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
  }

  @media (max-width: 640px) {
    .btn-primary,
    .btn-ghost {
      min-height: 44px;
    }

    .hero-actions {
      width: 100%;
    }

    .hero-actions .btn {
      width: calc(50% - 8px);
    }
  }

/* roulang page: article */
:root {
  --bg-deep: #050A14;
  --bg-surface: #0A1424;
  --bg-elevated: #101E37;
  --bg-footer: #02040A;
  --glass-bg: rgba(16, 30, 55, 0.55);
  --glass-border: rgba(255, 255, 255, 0.10);
  --primary: #1E5AFF;
  --primary-dark: #1244CC;
  --primary-light: #8FB1FF;
  --accent: #37E6C9;
  --warn: #FFB02E;
  --text-title: #EEF5FF;
  --text-body: #B7C4E0;
  --text-weak: #7186A8;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 36px rgba(30, 90, 255, 0.18);
  --glow-btn: 0 0 20px rgba(30, 90, 255, 0.45), 0 0 48px rgba(55, 230, 201, 0.18);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --font-serif: Georgia, 'Noto Serif SC', serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-body);
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    radial-gradient(1100px 560px at 85% -60px, rgba(30, 90, 255, 0.12), transparent 60%);
  background-size: 64px 64px, 64px 64px, auto;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

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

ul,
ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 36px;
}

.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  position: relative;
  padding-left: 20px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  transform: rotate(45deg);
}

/* ---------- 按钮 ---------- */
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  box-shadow: var(--glow-btn);
  transition: filter 0.25s, box-shadow 0.25s, transform 0.15s;
  text-align: center;
  white-space: nowrap;
}

.btn-glow:hover {
  filter: brightness(1.12);
  box-shadow: 0 0 28px rgba(30, 90, 255, 0.6), 0 0 60px rgba(55, 230, 201, 0.25);
  transform: translateY(-1px);
}

.btn-glow:active {
  transform: scale(0.98);
}

.btn-glow:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-glow i,
.btn-glow svg {
  font-size: 14px;
}

.btn-glow.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 8px;
}

.btn-glow.btn-lg {
  padding: 14px 34px;
  font-size: 16px;
  border-radius: 12px;
}

.btn-glow.btn-block {
  width: 100%;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(5, 10, 20, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.site-header.header-scrolled {
  background: rgba(5, 10, 20, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -0.3px;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-logo span {
  color: var(--accent);
  font-weight: 700;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  position: relative;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-title);
  background: rgba(255, 255, 255, 0.04);
}

.nav-link.active {
  color: var(--accent);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(55, 230, 201, 0.6);
}

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

.search-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-body);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
}

.search-btn:hover {
  color: var(--accent);
  border-color: rgba(55, 230, 201, 0.4);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text-title);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  background: rgba(5, 10, 20, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  padding: 32px 24px;
  gap: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.25s, visibility 0.25s, transform 0.25s;
}

.mobile-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-nav-link {
  display: block;
  padding: 14px 12px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-body);
  border-radius: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: all 0.2s;
}

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

.mobile-nav-link.active {
  color: var(--accent);
}

.mobile-menu-footer {
  margin-top: auto;
  padding: 16px 0 32px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-weak);
  transition: color 0.2s;
}

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

.breadcrumb-sep {
  color: rgba(113, 134, 168, 0.4);
}

.breadcrumb-current {
  color: var(--text-body);
  max-width: 360px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- 文章 Hero ---------- */
.article-hero {
  position: relative;
  padding: 48px 0 64px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  background: linear-gradient(180deg, rgba(30, 90, 255, 0.06), transparent 70%);
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -40px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 90, 255, 0.14), transparent 65%);
  pointer-events: none;
}

.article-hero-inner {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 48px;
  align-items: center;
  position: relative;
}

.article-hero-text {
  padding-left: 6px;
}

.article-title {
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-title);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  overflow-wrap: break-word;
}

.article-summary {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 16px;
}

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

.article-meta .meta-item i {
  font-size: 12px;
  color: var(--primary-light);
}

.article-meta .meta-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: rgba(30, 90, 255, 0.14);
  color: var(--primary-light);
  font-size: 12px;
  font-weight: 500;
  gap: 5px;
}

.trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(55, 230, 201, 0.07);
  border: 1px solid rgba(55, 230, 201, 0.18);
  color: var(--text-body);
  font-size: 12px;
}

.trust-badge i {
  color: var(--accent);
  font-size: 11px;
}

/* ---------- 文章封面 ---------- */
.article-cover-frame {
  position: relative;
  border-radius: 20px;
  padding: 14px;
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-card);
}

.article-cover-frame::before {
  content: '';
  position: absolute;
  inset: -14px;
  border: 1px dashed rgba(55, 230, 201, 0.22);
  border-radius: 26px;
  pointer-events: none;
}

.cover-img {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--bg-elevated), var(--bg-deep));
}

.cover-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cover-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 10, 20, 0) 55%, rgba(5, 10, 20, 0.6));
}

.cover-data-card {
  position: absolute;
  right: 24px;
  bottom: 32px;
  z-index: 2;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 14px 20px;
  min-width: 168px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-body);
}

.status-row + .status-row {
  margin-top: 8px;
}

.status-value {
  color: var(--accent);
  font-weight: 600;
  font-family: var(--font-serif);
  font-size: 13px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  margin-right: 6px;
  box-shadow: 0 0 8px rgba(55, 230, 201, 0.8);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(55, 230, 201, 0.4), 0 0 8px rgba(55, 230, 201, 0.8);
  }
  50% {
    box-shadow: 0 0 0 5px rgba(55, 230, 201, 0), 0 0 12px rgba(55, 230, 201, 0.9);
  }
}

/* ---------- 正文区 ---------- */
.article-section {
  padding: 72px 0 40px;
}

.article-body-card {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 20px;
  padding: 48px clamp(24px, 6vw, 68px);
  box-shadow: var(--shadow-card);
}

.article-body-card::before,
.article-body-card::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  border: 2px solid rgba(55, 230, 201, 0.35);
  border-radius: 4px;
  pointer-events: none;
}

.article-body-card::before {
  top: 16px;
  left: 16px;
  border-right-color: transparent;
  border-bottom-color: transparent;
}

.article-body-card::after {
  bottom: 16px;
  right: 16px;
  border-left-color: transparent;
  border-top-color: transparent;
}

.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-body);
}

.article-content p {
  margin: 0 0 24px;
}

.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-title);
  margin: 44px 0 18px;
  padding-left: 18px;
  position: relative;
  line-height: 1.4;
}

.article-content h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 3px;
  background: var(--accent);
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-title);
  margin: 32px 0 14px;
  line-height: 1.5;
}

.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-title);
  margin: 24px 0 10px;
}

.article-content ul {
  margin: 0 0 24px;
  padding-left: 24px;
}

.article-content ul li {
  position: relative;
  padding-left: 6px;
  margin-bottom: 10px;
}

.article-content ul li::before {
  content: '';
  position: absolute;
  left: -18px;
  top: 10px;
  width: 7px;
  height: 7px;
  background: var(--accent);
  transform: rotate(45deg);
  opacity: 0.8;
}

.article-content ol {
  margin: 0 0 24px;
  padding-left: 28px;
}

.article-content ol li {
  margin-bottom: 10px;
}

.article-content ol li::marker {
  color: var(--accent);
  font-family: var(--font-serif);
  font-weight: 700;
}

.article-content li > ul,
.article-content li > ol {
  margin-top: 8px;
}

.article-content blockquote {
  margin: 32px 0;
  padding: 20px 24px;
  border-left: 3px solid var(--primary);
  background: rgba(30, 90, 255, 0.08);
  border-radius: 0 14px 14px 0;
  color: var(--text-title);
  font-size: 15px;
}

.article-content blockquote p {
  margin-bottom: 8px;
}

.article-content blockquote p:last-child {
  margin-bottom: 0;
}

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(55, 230, 201, 0.4);
  transition: text-decoration-color 0.2s;
}

.article-content a:hover {
  text-decoration-color: var(--accent);
}

.article-content img {
  border-radius: 14px;
  width: 100%;
  height: auto;
  margin: 28px auto;
  box-shadow: var(--shadow-card);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
}

.article-content th,
.article-content td {
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 12px 16px;
  text-align: left;
}

.article-content th {
  background: rgba(30, 90, 255, 0.12);
  color: var(--text-title);
  font-weight: 600;
}

.article-content tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

.article-content code {
  background: rgba(30, 90, 255, 0.14);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.9em;
  color: var(--accent);
}

.article-content pre {
  background: var(--bg-footer);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 28px 0;
}

.article-content pre code {
  background: none;
  padding: 0;
  color: var(--text-body);
  font-size: 14px;
}

.article-content hr {
  border: none;
  height: 1px;
  margin: 40px 0;
  background: linear-gradient(90deg, transparent, rgba(30, 90, 255, 0.5), transparent);
}

/* ---------- 正文内 CTA 卡 ---------- */
.article-cta-card {
  margin-top: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(30, 90, 255, 0.12), rgba(16, 30, 55, 0.4));
  border: 1px solid rgba(30, 90, 255, 0.25);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.article-cta-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 6px;
}

.article-cta-card p {
  font-size: 14px;
  color: var(--text-body);
  margin: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 32px;
  font-size: 14px;
  color: var(--text-weak);
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--accent);
}

.back-link i {
  font-size: 12px;
}

/* ---------- 内容未找到 ---------- */
.not-found-card {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  padding: 64px 40px;
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
}

.not-found-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--accent);
  background: rgba(55, 230, 201, 0.08);
  border: 1px solid rgba(55, 230, 201, 0.2);
}

.not-found-card h2 {
  font-size: 24px;
  color: var(--text-title);
  margin-bottom: 12px;
}

.not-found-card p {
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 24px;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 相关文章 ---------- */
.related-section {
  padding: 64px 0 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.related-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
  opacity: 0;
  transition: opacity 0.3s;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(55, 230, 201, 0.35);
  box-shadow: var(--shadow-hover);
}

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

.related-date {
  font-size: 12px;
  color: var(--text-weak);
}

.related-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-title);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-arrow {
  margin-top: auto;
  align-self: flex-end;
  color: var(--text-weak);
  transition: color 0.2s, transform 0.2s;
}

.related-card:hover .related-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* ---------- 底部 CTA ---------- */
.cta-section {
  padding: 72px 0 0;
}

.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(5, 10, 20, 0.88), rgba(16, 30, 55, 0.82)),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border: 1px solid var(--glass-border);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-card);
}

.cta-band::before {
  content: '';
  position: absolute;
  top: -60px;
  right: 10%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(55, 230, 201, 0.15), transparent 70%);
  pointer-events: none;
}

.cta-band-text {
  position: relative;
}

.cta-band-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

.cta-band-text p {
  font-size: 14px;
  color: var(--text-body);
  margin: 0;
}

.cta-band-action {
  position: relative;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 80px;
  background: var(--bg-footer);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding: 56px 0 40px;
}

.footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 12px;
}

.footer-logo span {
  color: var(--accent);
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.8;
  max-width: 320px;
  margin-bottom: 16px;
}

.footer-brand .email {
  font-size: 13px;
  color: var(--text-body);
  transition: color 0.2s;
}

.footer-brand .email:hover {
  color: var(--accent);
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 16px;
  position: relative;
  padding-left: 14px;
}

.footer-col-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  transform: rotate(45deg);
}

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

.footer-links a {
  font-size: 13px;
  color: var(--text-weak);
  transition: color 0.2s, padding-left 0.2s;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 20px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 13px;
  color: var(--text-weak);
}

.footer-bottom a {
  transition: color 0.2s;
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* ---------- 表单弹层 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(5, 10, 20, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 520px;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  transform: translateY(20px) scale(0.98);
  transition: transform 0.3s;
}

.modal-overlay.open .modal-card {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-weak);
  cursor: pointer;
  transition: all 0.2s;
}

.modal-close:hover {
  color: var(--text-title);
  border-color: rgba(255, 255, 255, 0.2);
}

.modal-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 6px;
}

.modal-sub {
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-body);
  margin-bottom: 8px;
}

.form-group input,
.form-group select {
  width: 100%;
  height: 46px;
  background: rgba(5, 10, 20, 0.6);
  border: 1px solid #24385A;
  border-radius: 10px;
  padding: 0 14px;
  color: var(--text-title);
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(55, 230, 201, 0.12);
}

.form-group input::placeholder {
  color: rgba(113, 134, 168, 0.6);
}

.privacy-note {
  font-size: 12px;
  color: var(--text-weak);
  text-align: center;
  margin: 14px 0 0;
  line-height: 1.6;
}

.modal-footer {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-weak);
}

.modal-footer i {
  color: var(--accent);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .article-hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .article-hero-text {
    padding-left: 0;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .site-header {
    height: 60px;
  }

  .header-inner {
    height: 60px;
    gap: 16px;
  }

  .main-nav {
    display: none;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-menu {
    top: 60px;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 26px;
  }

  .article-hero {
    padding: 32px 0 40px;
  }

  .article-section {
    padding: 48px 0 24px;
  }

  .article-body-card {
    padding: 32px 24px;
  }

  .article-cta-card {
    padding: 24px;
  }

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

  .cta-section {
    padding: 48px 0 0;
  }

  .cta-band {
    padding: 28px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 0 32px;
  }

  .btn-glow {
    box-shadow: 0 0 12px rgba(30, 90, 255, 0.35);
  }

  .article-cover-frame::before {
    opacity: 0.6;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .breadcrumb-current {
    max-width: 200px;
  }

  .article-title {
    font-size: 27px;
  }

  .article-summary {
    -webkit-line-clamp: 4;
  }

  .article-meta {
    gap: 10px;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-band .btn-glow {
    width: 100%;
  }

  .modal-card {
    padding: 32px 24px;
  }
}

@media (max-width: 420px) {
  .trust-badges {
    gap: 8px;
  }

  .trust-badge {
    padding: 5px 10px;
    font-size: 11px;
  }

  .cover-data-card {
    right: 10px;
    bottom: 14px;
    min-width: 150px;
    padding: 10px 14px;
  }

  .article-body-card {
    padding: 28px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}