/* roulang page: index */
:root{
    --primary:#2D7CB5;
    --primary-dark:#1E5E8D;
    --primary-light:#74A9CF;
    --page-bg:#F6F9FC;
    --card-bg:#FFFFFF;
    --alt-bg:#ECF3F9;
    --text-main:#263646;
    --text-sub:#50616F;
    --text-weak:#8A9AAA;
    --border:#DAE4EE;
    --accent:#DD9B45;
    --radius-lg:16px;
    --radius-md:10px;
    --shadow:0 8px 30px rgba(38,64,92,0.08);
    --shadow-hover:0 12px 36px rgba(38,64,92,0.13);
    --font-main:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
    font-family:var(--font-main);
    background:var(--page-bg);
    color:var(--text-main);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
}
.container{max-width:1240px;margin:0 auto;padding:0 24px;}
a{color:var(--primary);text-decoration:none;transition:all .2s ease;}
a:hover{color:var(--primary-dark);}
img{max-width:100%;height:auto;display:block;}
ul,ol{list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
section{margin-bottom:clamp(64px,8vw,110px);}
.section-label{
    font-size:13px;
    font-weight:600;
    letter-spacing:.08em;
    color:var(--primary);
    text-transform:uppercase;
    display:inline-block;
    margin-bottom:8px;
    background:rgba(45,124,181,.08);
    padding:4px 14px;
    border-radius:999px;
}
h2{
    font-size:clamp(24px,2.8vw,34px);
    font-weight:600;
    line-height:1.35;
    color:var(--text-main);
    margin-bottom:16px;
}
h3{
    font-size:20px;
    font-weight:600;
    line-height:1.4;
    color:var(--text-main);
}
p{color:var(--text-sub);font-size:15px;line-height:1.8;margin-bottom:16px;}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:14px 32px;
    border-radius:var(--radius-md);
    font-size:15px;
    font-weight:600;
    border:none;
    cursor:pointer;
    transition:all .2s ease;
    text-align:center;
    min-height:48px;
}
.btn-primary{
    background:var(--primary);
    color:#fff;
}
.btn-primary:hover{
    background:var(--primary-dark);
    color:#fff;
    transform:translateY(-1px);
    box-shadow:0 8px 20px rgba(45,124,181,.25);
}
.btn-secondary{
    background:#fff;
    color:var(--primary);
    border:1px solid var(--primary);
}
.btn-secondary:hover{
    background:#F0F6FB;
    color:var(--primary-dark);
    border-color:var(--primary-dark);
}
.btn-text{
    color:var(--primary);
    font-size:14px;
    font-weight:500;
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:8px 0;
}
.btn-text:hover{color:var(--primary-dark);}
.btn-text .arrow{transition:transform .2s ease;}
.btn-text:hover .arrow{transform:translateX(4px);}
.badge{
    display:inline-block;
    padding:4px 12px;
    border-radius:999px;
    background:#E8F1F9;
    color:var(--primary);
    font-size:12px;
    font-weight:500;
    line-height:1.4;
}
body{padding-bottom:80px;}

/* ============ HEADER ============ */
.site-header{
    background:#fff;
    border-bottom:1px solid #E5EDF3;
    height:76px;
    position:sticky;
    top:0;
    z-index:100;
    width:100%;
}
.site-header .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:100%;
}
.brand{
    display:flex;
    align-items:center;
    gap:10px;
}
.brand-icon{
    width:36px;
    height:36px;
    border-radius:8px;
    background:var(--primary);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:700;
    font-size:18px;
    flex-shrink:0;
}
.brand-text{
    font-size:18px;
    font-weight:700;
    color:var(--text-main);
    white-space:nowrap;
}
.site-nav{
    display:flex;
    align-items:center;
    gap:36px;
}
.site-nav a{
    font-size:14px;
    font-weight:500;
    color:var(--text-sub);
    padding:6px 2px;
    position:relative;
}
.site-nav a:hover{color:var(--primary);}
.site-nav a.active{
    color:var(--primary);
}
.site-nav a.active::after{
    content:'';
    position:absolute;
    bottom:-2px;
    left:0;
    width:100%;
    height:2px;
    border-radius:2px;
    background:var(--primary);
}
.nav-cta-btn{
    padding:9px 20px !important;
    border:1px solid var(--primary) !important;
    border-radius:8px !important;
    color:var(--primary) !important;
    font-weight:600 !important;
}
.nav-cta-btn:hover{
    background:#F0F6FB;
}
.menu-toggle{
    display:none;
    background:none;
    border:none;
    padding:10px;
    cursor:pointer;
    flex-direction:column;
    gap:5px;
}
.menu-toggle span{
    width:22px;
    height:2px;
    background:var(--text-main);
    border-radius:2px;
    display:block;
    transition:all .2s ease;
}

/* ============ HERO ============ */
.hero{
    position:relative;
    min-height:560px;
    display:flex;
    align-items:center;
    background:linear-gradient(180deg,#FFFFFF 0%,#F0F7FC 100%);
    padding:80px 0;
    overflow:hidden;
}
.hero::before{
    content:'';
    position:absolute;
    inset:0;
    background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    opacity:.35;
}
.hero .hero-inner{
    position:relative;
    z-index:2;
}
.hero h1{
    font-size:clamp(30px,4.2vw,46px);
    font-weight:700;
    line-height:1.25;
    color:var(--text-main);
    max-width:680px;
    margin-bottom:20px;
}
.hero h1 .highlight{
    color:var(--primary);
}
.hero-sub{
    font-size:16px;
    color:var(--text-sub);
    line-height:1.8;
    max-width:600px;
    margin-bottom:36px;
}
.hero-cta{
    display:flex;
    align-items:center;
    gap:20px;
    flex-wrap:wrap;
    margin-bottom:48px;
}
.hero-trust{
    display:flex;
    align-items:center;
    gap:0;
    flex-wrap:wrap;
}
.trust-item{
    padding:0 28px;
    text-align:center;
    position:relative;
}
.trust-item:first-child{padding-left:0;}
.trust-item::after{
    content:'';
    position:absolute;
    right:0;
    top:18%;
    height:64%;
    width:1px;
    background:var(--border);
}
.trust-item:last-child::after{display:none;}
.trust-num{
    font-family:var(--font-num);
    font-size:28px;
    font-weight:700;
    color:var(--primary);
    line-height:1.3;
}
.trust-label{
    font-size:13px;
    color:var(--text-weak);
    margin-top:4px;
}

/* ============ SELLING POINTS ============ */
.selling-points{
    padding:50px 0 0;
}
.selling-points .sp-header{
    text-align:center;
    margin-bottom:48px;
}
.sp-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    background:var(--card-bg);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow);
    overflow:hidden;
    border:1px solid var(--border);
}
.sp-item{
    padding:40px 36px;
    position:relative;
    transition:background .2s ease;
    border-right:1px solid var(--border);
}
.sp-item:last-child{border-right:none;}
.sp-item:hover{background:#F9FCFE;}
.sp-item::before{
    content:'';
    position:absolute;
    left:0;
    top:50%;
    transform:translateY(-50%);
    width:2px;
    height:0;
    background:var(--primary);
    transition:height .2s ease;
}
.sp-item:hover::before{height:60%;}
.sp-num{
    font-family:var(--font-num);
    font-size:48px;
    font-weight:700;
    color:var(--accent);
    line-height:1;
    margin-bottom:16px;
    display:block;
    transition:transform .2s ease;
}
.sp-item:hover .sp-num{transform:scale(1.05);}
.sp-item h3{
    font-size:20px;
    font-weight:600;
    margin-bottom:10px;
    transition:color .2s ease;
}
.sp-item:hover h3{color:var(--primary);}
.sp-item p{
    font-size:14px;
    color:var(--text-sub);
    line-height:1.7;
    margin-bottom:0;
}

/* ============ SCENARIO ============ */
.scenario-block{
    display:flex;
    align-items:center;
    gap:60px;
    padding:60px 0;
}
.scenario-block .scenario-img{
    flex:0 0 55%;
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:0 16px 48px rgba(38,64,92,0.12);
    position:relative;
}
.scenario-block .scenario-img::before{
    content:'';
    position:absolute;
    left:0;
    top:0;
    bottom:0;
    width:4px;
    background:var(--primary);
    z-index:2;
}
.scenario-block .scenario-img img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
}
.scenario-block .scenario-text{
    flex:0 0 45%;
}
.scenario-block .scenario-text .section-label{
    margin-bottom:12px;
}
.scenario-block .scenario-text h2{
    margin-bottom:14px;
}
.scenario-block .scenario-text p{
    font-size:15px;
    margin-bottom:20px;
}
.scenario-list{
    margin-bottom:24px;
}
.scenario-list li{
    position:relative;
    padding-left:28px;
    font-size:15px;
    color:var(--text-sub);
    line-height:1.8;
    margin-bottom:10px;
}
.scenario-list li::before{
    content:'';
    position:absolute;
    left:0;
    top:12px;
    width:8px;
    height:8px;
    border-radius:50%;
    background:var(--primary-light);
}
.scenario-block.reverse .scenario-text{
    order:1;
}
.scenario-block.reverse .scenario-img{
    order:2;
}
.scenario-bg-alt{
    background:var(--alt-bg);
    padding:60px 0;
}

/* ============ SOCIAL PROOF ============ */
.social-proof{
    padding:50px 0;
}
.sp-title-wrap{
    text-align:center;
    margin-bottom:48px;
}
.sp-title-wrap h2{text-align:center;}
.sp-title-wrap p{
    max-width:600px;
    margin:0 auto;
}
.testimonial-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
    margin-bottom:48px;
}
.testimonial-card{
    background:#F1F6FA;
    border-radius:var(--radius-lg);
    padding:32px;
    position:relative;
    transition:box-shadow .2s ease;
}
.testimonial-card:hover{
    box-shadow:var(--shadow);
}
.testimonial-card::before{
    content:'“';
    font-size:48px;
    font-family:Georgia,serif;
    color:var(--primary);
    display:block;
    line-height:1;
    margin-bottom:12px;
}
.testimonial-card p{
    font-size:14px;
    line-height:1.8;
    color:var(--text-sub);
    margin-bottom:16px;
}
.testimonial-author{
    font-size:13px;
    color:var(--text-weak);
}
.testimonial-author strong{
    color:var(--text-main);
    font-weight:600;
}
.stats-bar{
    background:var(--primary);
    border-radius:12px;
    padding:36px 48px;
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
}
.stat-item{
    text-align:center;
    color:#fff;
}
.stat-item .stat-num{
    font-family:var(--font-num);
    font-size:26px;
    font-weight:700;
    color:#fff;
    display:block;
    margin-bottom:4px;
}
.stat-item .stat-label{
    font-size:13px;
    color:rgba(255,255,255,.75);
}

/* ============ NEWS LIST ============ */
.news-section{
    padding:30px 0;
}
.news-section-header{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    margin-bottom:36px;
    flex-wrap:wrap;
    gap:16px;
}
.news-card{
    display:flex;
    background:var(--card-bg);
    border-radius:12px;
    border:1px solid #E5EDF3;
    box-shadow:var(--shadow);
    overflow:hidden;
    margin-bottom:24px;
    transition:box-shadow .2s ease, transform .2s ease;
    min-height:150px;
}
.news-card:hover{
    box-shadow:var(--shadow-hover);
    transform:translateY(-2px);
}
.news-cover{
    flex:0 0 280px;
    max-height:160px;
    overflow:hidden;
}
.news-cover img{
    width:100%;
    height:100%;
    object-fit:cover;
    aspect-ratio:16/9;
}
.news-content{
    padding:20px 24px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    flex:1;
    min-width:0;
}
.news-content h3{
    font-size:18px;
    font-weight:600;
    margin-bottom:8px;
    line-height:1.4;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.news-content h3 a{
    color:var(--text-main);
    transition:color .2s ease;
}
.news-card:hover .news-content h3 a{
    color:var(--primary);
}
.news-content p{
    font-size:14px;
    color:var(--text-sub);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
    margin-bottom:10px;
}
.news-meta{
    display:flex;
    align-items:center;
    gap:12px;
    font-size:13px;
    color:var(--text-weak);
    flex-wrap:wrap;
}
.news-meta .meta-date{
    margin-left:auto;
}
.news-meta .read-link{
    font-size:13px;
    color:var(--primary);
    font-weight:500;
    display:inline-flex;
    align-items:center;
    gap:4px;
    transition:gap .2s ease;
}
.news-meta .read-link:hover{
    gap:8px;
    color:var(--primary-dark);
}
.empty-state{
    border:2px dashed var(--border);
    border-radius:12px;
    min-height:200px;
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--text-weak);
    font-size:15px;
    background:#FAFCFE;
}

/* ============ FAQ ============ */
.faq-section{
    max-width:900px;
    margin:0 auto clamp(64px,8vw,110px);
}
.faq-section h2{
    text-align:center;
    margin-bottom:12px;
}
.faq-section .faq-sub{
    text-align:center;
    margin-bottom:40px;
}
.faq-item{
    background:#fff;
    border-bottom:1px solid var(--border);
    overflow:hidden;
    transition:border-color .2s ease;
}
.faq-item:first-child{border-top:1px solid var(--border);}
.faq-question{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:22px 24px;
    cursor:pointer;
    font-size:16px;
    font-weight:500;
    color:var(--text-main);
    transition:color .2s ease;
    min-height:44px;
}
.faq-question:hover{color:var(--primary);}
.faq-icon{
    position:relative;
    width:16px;
    height:16px;
    flex-shrink:0;
    margin-left:16px;
}
.faq-icon::before,
.faq-icon::after{
    content:'';
    position:absolute;
    background:var(--primary);
    border-radius:1px;
    transition:transform .2s ease;
}
.faq-icon::before{
    width:16px;
    height:2px;
    top:7px;
    left:0;
}
.faq-icon::after{
    width:2px;
    height:16px;
    top:0;
    left:7px;
}
.faq-item.active .faq-icon::after{
    transform:scaleY(0);
}
.faq-answer{
    max-height:0;
    overflow:hidden;
    transition:max-height .25s ease, padding .25s ease;
    background:#F7FAFC;
    padding:0 24px;
}
.faq-item.active .faq-answer{
    max-height:300px;
    padding:20px 24px;
}
.faq-answer p{
    font-size:14px;
    color:var(--text-sub);
    line-height:1.8;
    margin-bottom:0;
}
.faq-item.active{
    border:1px solid var(--primary-light);
    border-radius:10px;
    margin-bottom:12px;
    box-shadow:0 4px 16px rgba(45,124,181,.08);
}
.faq-item.active:first-child{
    border-top:1px solid var(--primary-light);
}

/* ============ CTA ============ */
.cta-section{
    background:#EAF2F9;
    border-radius:20px;
    padding:48px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
    flex-wrap:wrap;
    position:relative;
    overflow:hidden;
}
.cta-section::before{
    content:'';
    position:absolute;
    right:0;
    top:0;
    width:40%;
    height:100%;
    background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    opacity:.08;
    border-radius:0 20px 20px 0;
}
.cta-section h2{
    font-size:clamp(20px,2.2vw,28px);
    margin-bottom:8px;
    color:var(--text-main);
    position:relative;
    z-index:2;
}
.cta-section p{
    font-size:14px;
    color:var(--text-sub);
    margin-bottom:0;
    position:relative;
    z-index:2;
}
.cta-section .btn{
    position:relative;
    z-index:2;
    flex-shrink:0;
}

/* ============ FOOTER ============ */
.site-footer{
    background:#1D2D3F;
    padding:64px 0 0;
    color:rgba(255,255,255,.7);
}
.footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1fr;
    gap:40px;
    padding-bottom:48px;
    border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand .brand-text{
    color:#fff;
    font-size:18px;
    font-weight:700;
    margin-bottom:12px;
    display:block;
}
.footer-brand p{
    font-size:13px;
    color:rgba(255,255,255,.55);
    line-height:1.7;
    margin-bottom:16px;
}
.footer-col h4{
    color:#fff;
    font-size:14px;
    font-weight:600;
    margin-bottom:12px;
    text-transform:uppercase;
    letter-spacing:.05em;
}
.footer-col ul li{
    margin-bottom:8px;
}
.footer-col ul li a{
    font-size:13px;
    color:rgba(255,255,255,.55);
}
.footer-col ul li a:hover{
    color:#fff;
}
.footer-social{
    display:flex;
    gap:12px;
    margin-top:16px;
}
.footer-social a{
    width:34px;
    height:34px;
    border-radius:8px;
    background:rgba(255,255,255,.08);
    display:flex;
    align-items:center;
    justify-content:center;
    color:#fff;
    font-size:14px;
    transition:background .2s ease;
}
.footer-social a:hover{
    background:var(--primary);
}
.footer-bottom{
    padding:20px 0;
    display:flex;
    align-items:center;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:12px;
    font-size:13px;
    color:rgba(255,255,255,.4);
}
.footer-bottom a{
    color:rgba(255,255,255,.4);
    margin-left:16px;
}
.footer-bottom a:hover{
    color:#fff;
}

/* ============ FIXED BAR ============ */
.fixed-bar{
    position:fixed;
    bottom:0;
    left:0;
    right:0;
    height:64px;
    background:rgba(255,255,255,0.92);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-top:1px solid #E2EAF2;
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:0 24px;
    z-index:90;
}
.fixed-bar .bar-text{
    font-size:14px;
    color:var(--text-main);
    font-weight:500;
}
.fixed-bar .btn{
    padding:10px 28px;
    font-size:14px;
    min-height:40px;
    border-radius:10px;
}

/* ============ RESPONSIVE ============ */
@media screen and (max-width:1024px){
    .site-nav{
        gap:24px;
    }
    .scenario-block{
        gap:36px;
    }
    .footer-grid{
        grid-template-columns:1fr 1fr;
    }
}
@media screen and (max-width:768px){
    .menu-toggle{
        display:flex;
    }
    .site-nav{
        position:fixed;
        top:76px;
        left:0;
        right:0;
        background:#fff;
        flex-direction:column;
        align-items:flex-start;
        padding:24px 24px 36px;
        gap:8px;
        transform:translateY(-120%);
        transition:transform .3s ease;
        box-shadow:0 8px 30px rgba(0,0,0,.08);
        border-bottom:1px solid var(--border);
        z-index:99;
    }
    .site-nav.open{
        transform:translateY(0);
    }
    .site-nav a{
        font-size:16px;
        line-height:2.8;
        width:100%;
    }
    .site-nav a.active::after{
        display:none;
    }
    .site-nav a.active{
        color:var(--primary);
        font-weight:600;
    }
    .nav-cta-btn{
        display:none !important;
    }
    .sp-grid{
        grid-template-columns:1fr;
    }
    .sp-item{
        border-right:none;
        border-bottom:1px solid var(--border);
        padding:32px 28px;
    }
    .sp-item:last-child{
        border-bottom:none;
    }
    .sp-item::before{
        left:0;
        top:0;
        width:2px;
        height:0;
        transform:none;
    }
    .scenario-block{
        flex-direction:column;
        gap:28px;
        padding:40px 0;
    }
    .scenario-block .scenario-img{
        flex:1 1 auto;
        width:100%;
    }
    .scenario-block .scenario-text{
        flex:1 1 auto;
        width:100%;
    }
    .scenario-block.reverse .scenario-img,
    .scenario-block.reverse .scenario-text{
        order:0;
    }
    .testimonial-grid{
        grid-template-columns:1fr;
    }
    .stats-bar{
        grid-template-columns:1fr 1fr;
        padding:28px 24px;
    }
    .news-card{
        flex-direction:column;
    }
    .news-cover{
        flex:none;
        width:100%;
        max-height:none;
    }
    .news-cover img{
        aspect-ratio:16/9;
    }
    .cta-section{
        padding:32px 28px;
        flex-direction:column;
        text-align:center;
    }
    .footer-grid{
        grid-template-columns:1fr;
        gap:32px;
    }
    .fixed-bar{
        height:68px;
        padding:0 16px;
    }
    .fixed-bar .bar-text{
        font-size:13px;
    }
    .fixed-bar .btn{
        padding:8px 20px;
        font-size:13px;
    }
    .trust-item{
        padding:0 14px;
    }
    .trust-num{
        font-size:22px;
    }
    .hero{
        padding:60px 0;
        min-height:auto;
    }
    .hero-cta{
        flex-direction:column;
        align-items:flex-start;
    }
    .hero-trust{
        flex-direction:column;
        gap:16px;
        align-items:flex-start;
    }
    .trust-item{
        padding:0;
    }
    .trust-item::after{
        display:none;
    }
}
@media screen and (max-width:520px){
    .container{
        padding:0 16px;
    }
    .brand-text{
        font-size:16px;
        max-width:220px;
        white-space:nowrap;
        overflow:hidden;
        text-overflow:ellipsis;
    }
    .stats-bar{
        grid-template-columns:1fr 1fr;
        gap:16px;
    }
    .stat-item .stat-num{
        font-size:22px;
    }
    .footer-bottom{
        flex-direction:column;
        text-align:center;
    }
    .footer-bottom a{
        margin:0 8px;
    }
}

/* roulang page: category1 */
/* ===== CSS Variables & Reset ===== */
        :root {
            --primary: #2D7CB5;
            --primary-dark: #1E5E8D;
            --primary-light: #74A9CF;
            --page-bg: #F6F9FC;
            --card-bg: #FFFFFF;
            --alt-bg: #ECF3F9;
            --text-main: #263646;
            --text-sub: #50616F;
            --text-muted: #8A9AAA;
            --border: #DAE4EE;
            --border-light: #E5EDF3;
            --accent: #DD9B45;
            --shadow-card: 0 8px 30px rgba(38, 64, 92, 0.08);
            --shadow-hover: 0 12px 36px rgba(38, 64, 92, 0.13);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--page-bg);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 16px;
            padding-bottom: 64px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1240px;
            padding-left: 24px;
            padding-right: 24px;
            margin: 0 auto;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            line-height: 1.4;
            text-align: center;
            min-height: 44px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(45, 124, 181, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(30, 94, 141, 0.3);
        }
        .btn-outline {
            background: #fff;
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: #F0F6FB;
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(255, 255, 255, 0.15);
        }
        .btn-light:hover {
            background: #EAF2F9;
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            transition: gap var(--transition);
        }
        .arrow-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }
        .arrow-link i {
            font-size: 12px;
        }

        /* ===== Tags & Badges ===== */
        .tag-pill {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            background: #E8F1F9;
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            line-height: 1.6;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 12px;
            position: relative;
        }
        .section-tag::after {
            content: "";
            display: block;
            width: 32px;
            height: 2px;
            background: var(--primary-light);
            margin-top: 8px;
            border-radius: 2px;
        }

        /* ===== Header Navigation ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: var(--primary);
        }
        .brand-logo .logo-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 3px;
            display: inline-block;
            flex-shrink: 0;
        }
        .site-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }
        .site-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            position: relative;
            padding: 8px 0;
            line-height: 1.2;
            transition: color var(--transition);
        }
        .site-nav a:hover {
            color: var(--primary);
        }
        .site-nav a.active {
            color: var(--primary);
        }
        .site-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta-btn {
            padding: 8px 20px !important;
            border: 1px solid var(--primary);
            border-radius: 999px;
            color: var(--primary) !important;
            font-weight: 600 !important;
            transition: all var(--transition) !important;
        }
        .nav-cta-btn:hover {
            background: var(--primary);
            color: #fff !important;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(135deg, #fff 0%, #EFF6FB 100%), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            border-bottom: 1px solid var(--border-light);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(43, 108, 147, 0.06);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-eyebrow {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--primary);
            display: block;
            margin-bottom: 16px;
        }
        .page-hero h1 {
            font-size: clamp(32px, 4.5vw, 46px);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .page-hero h1 .highlight {
            color: var(--primary);
        }
        .page-hero p.hero-sub {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 520px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-metrics {
            display: flex;
            gap: 32px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-metrics .metric {
            text-align: left;
        }
        .hero-metrics .metric-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-metrics .metric-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .hero-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(38, 64, 92, 0.12);
        }
        .hero-media img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }
        .hero-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(43, 108, 147, 0.06);
            border-radius: var(--radius-lg);
        }

        /* ===== Intro Section ===== */
        .intro-section {
            background: #fff;
            padding: 90px 0;
        }
        .intro-text h2 {
            font-size: clamp(24px, 2.8vw, 34px);
            font-weight: 600;
            line-height: 1.35;
            margin-bottom: 20px;
        }
        .intro-text p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 16px;
            max-width: 460px;
        }
        .intro-text .feature-list {
            margin-top: 24px;
        }
        .intro-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .intro-text .feature-list li i {
            color: var(--primary);
            font-size: 14px;
            margin-top: 4px;
        }
        .intro-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .intro-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* ===== Topics Section ===== */
        .topics-section {
            background: var(--alt-bg);
            padding: 90px 0;
        }
        .section-head {
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: clamp(24px, 2.8vw, 34px);
            font-weight: 600;
            line-height: 1.35;
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-sub);
            max-width: 680px;
        }
        .topic-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 32px 28px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .topic-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 3px;
            height: 100%;
            background: transparent;
            transition: background var(--transition);
        }
        .topic-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .topic-card:hover::before {
            background: var(--primary);
        }
        .topic-num {
            font-size: 48px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 20px;
            transition: transform 0.2s;
            display: inline-block;
        }
        .topic-card:hover .topic-num {
            transform: scale(1.05);
        }
        .topic-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .topic-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Resources Section ===== */
        .resources-section {
            background: #fff;
            padding: 90px 0;
        }
        .resource-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            height: 100%;
        }
        .resource-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .resource-icon {
            width: 52px;
            height: 52px;
            background: #E8F1F9;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .resource-info {
            flex: 1;
        }
        .resource-info h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-main);
            line-height: 1.4;
        }
        .resource-info .resource-meta {
            font-size: 13px;
            color: var(--text-muted);
        }
        .resource-arrow {
            color: var(--primary);
            font-size: 16px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .resource-card:hover .resource-arrow {
            transform: translateX(4px);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--alt-bg);
            padding: 90px 0;
        }
        .faq-section .accordion {
            max-width: 900px;
            margin: 0 auto;
            background: transparent;
            border: none;
        }
        .accordion-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .accordion-item:hover {
            box-shadow: var(--shadow-card);
        }
        .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            background: #fff;
            cursor: pointer;
            border: none;
            transition: color var(--transition);
            width: 100%;
            text-align: left;
        }
        .accordion-title:hover {
            color: var(--primary);
        }
        .accordion-title .faq-icon {
            font-size: 18px;
            color: var(--primary);
            transition: transform 0.3s;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .accordion-item.is-active .accordion-title .faq-icon {
            transform: rotate(45deg);
        }
        .accordion-content {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }
        .accordion-content:not(:last-child) {
            border-bottom: none;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 84px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
        }
        .cta-box {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            padding: 44px 48px;
            backdrop-filter: blur(4px);
        }
        .cta-box h2 {
            font-size: clamp(22px, 3vw, 30px);
            color: #fff;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1D2D3F;
            color: #A8B5C2;
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            max-width: 280px;
            margin-bottom: 20px;
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: var(--primary-light);
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: #8A9AAA;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: #7A8794;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: #7A8794;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Bottom Fixed Bar ===== */
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            z-index: 200;
            box-shadow: 0 -2px 20px rgba(38, 64, 92, 0.06);
        }
        .bottom-bar .bb-text {
            font-size: 14px;
            color: var(--text-main);
            font-weight: 500;
        }
        .bottom-bar .bb-btn {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 10px;
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
            min-height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .bottom-bar .bb-btn:hover {
            background: var(--primary-dark);
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1023px) {
            .header-inner {
                height: 64px;
            }
            .site-nav {
                gap: 20px;
            }
            .site-nav a {
                font-size: 13px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-brand {
                grid-column: span 2;
            }
            .page-hero {
                padding: 64px 0 48px;
            }
            .hero-media img {
                height: 280px;
            }
            .cta-box {
                padding: 36px 32px;
            }
        }

        @media screen and (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                gap: 16px;
            }
            .site-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 40px rgba(38, 64, 92, 0.1);
                gap: 0;
                align-items: stretch;
            }
            .site-nav.open {
                display: flex;
            }
            .site-nav a {
                padding: 12px 0;
                font-size: 16px;
                border-bottom: 1px solid var(--border-light);
            }
            .site-nav a:last-child {
                border-bottom: none;
            }
            .site-nav a.active::after {
                display: none;
            }
            .nav-cta-btn {
                border: none;
                padding: 12px 0 !important;
                color: var(--primary) !important;
                font-weight: 600;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero {
                padding: 48px 0 40px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p.hero-sub {
                font-size: 15px;
            }
            .hero-metrics {
                gap: 20px;
                margin-top: 32px;
            }
            .hero-media {
                margin-top: 32px;
            }
            .hero-media img {
                height: 220px;
            }
            .intro-section {
                padding: 60px 0;
            }
            .topics-section {
                padding: 60px 0;
            }
            .resources-section {
                padding: 60px 0;
            }
            .resource-card {
                flex-direction: row;
                align-items: center;
                padding: 16px 18px;
            }
            .resource-icon {
                width: 44px;
                height: 44px;
                font-size: 18px;
            }
            .faq-section {
                padding: 60px 0;
            }
            .accordion-title {
                padding: 16px 18px;
                font-size: 15px;
            }
            .accordion-content {
                padding: 0 18px 16px;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-box {
                flex-direction: column;
                padding: 28px 24px;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .bottom-bar {
                height: 68px;
                padding: 0 16px;
            }
            .bottom-bar .bb-text {
                font-size: 13px;
            }
            .bottom-bar .bb-btn {
                padding: 8px 16px;
                font-size: 13px;
            }
            body {
                padding-bottom: 68px;
            }
        }

        @media screen and (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-metrics .metric-num {
                font-size: 24px;
            }
            .topic-card {
                padding: 24px 20px;
            }
            .topic-num {
                font-size: 40px;
            }
            .cta-box h2 {
                font-size: 22px;
            }
        }

        /* ===== Utility ===== */
        .mb-0 {
            margin-bottom: 0 !important;
        }
        .mt-1 {
            margin-top: 8px !important;
        }
        .mt-2 {
            margin-top: 16px !important;
        }
        .mt-3 {
            margin-top: 24px !important;
        }
        .mb-2 {
            margin-bottom: 16px !important;
        }
        .mb-3 {
            margin-bottom: 24px !important;
        }
        .mb-4 {
            margin-bottom: 32px !important;
        }
        .text-center {
            text-align: center !important;
        }

/* roulang page: article */
:root {
            --primary: #2D7CB5;
            --primary-dark: #1E5E8D;
            --primary-light: #74A9CF;
            --bg: #F6F9FC;
            --card-bg: #FFFFFF;
            --alt-bg: #ECF3F9;
            --text: #263646;
            --text-secondary: #50616F;
            --text-muted: #8A9AAA;
            --border: #DAE4EE;
            --accent: #DD9B45;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 30px rgba(38, 64, 92, 0.08);
            --shadow-hover: 0 12px 36px rgba(38, 64, 92, 0.13);
            --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            padding-bottom: 60px;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-family: var(--font-main);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: all .25s ease;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 18px rgba(45, 124, 181, .22);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(30, 94, 141, .3);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-outline:hover {
            background: #F0F6FB;
            color: var(--primary-dark);
        }

        .btn-lg {
            padding: 16px 38px;
            font-size: 16px;
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 13px;
        }

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

        .btn-white:hover {
            background: #EAF2F9;
            color: var(--primary-dark);
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 999px;
            background: #E8F1F9;
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            line-height: 1.6;
            white-space: nowrap;
        }

        .badge-accent {
            background: rgba(221, 155, 69, .12);
            color: #B0782D;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid #E5EDF3;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .site-logo .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .site-logo:hover {
            color: var(--text);
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .site-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 2px;
            position: relative;
            transition: color .2s ease;
            line-height: 1.6;
        }

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

        .site-nav a.active {
            color: var(--primary);
        }

        .site-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .site-nav .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            padding: 9px 22px;
            border: 1px solid var(--primary);
            border-radius: 999px;
            color: var(--primary);
            font-weight: 600;
            background: transparent;
            white-space: nowrap;
        }

        .site-nav .nav-cta-btn:hover {
            background: var(--primary);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 10px 6px;
            z-index: 110;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            margin: 5px 0;
            border-radius: 2px;
            transition: all .3s ease;
        }

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

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

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

        /* ===== Breadcrumb ===== */
        .page-breadcrumb {
            padding: 20px 0;
            background: #fff;
            border-bottom: 1px solid #EEF2F6;
            font-size: 13px;
            color: var(--text-muted);
        }

        .page-breadcrumb a {
            color: var(--text-muted);
        }

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

        .page-breadcrumb .sep {
            margin: 0 8px;
            color: #C0CCD8;
        }

        .page-breadcrumb .current {
            color: var(--text-secondary);
            display: inline-block;
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            vertical-align: bottom;
        }

        /* ===== Article Header ===== */
        .article-header-section {
            padding: 56px 0 24px;
            background: var(--bg);
        }

        .article-header-inner {
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }

        .article-header-inner .badge-list {
            margin-bottom: 18px;
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .article-header-inner h1 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: .5px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .article-meta .meta-divider {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: #C0CCD8;
        }

        /* ===== Article Cover ===== */
        .article-cover-wrap {
            margin: 32px auto 0;
            max-width: 1000px;
        }

        .article-cover-wrap img {
            width: 100%;
            aspect-ratio: 16 / 7;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }

        /* ===== Article Body ===== */
        .article-body-section {
            padding: 44px 0 64px;
            background: var(--bg);
        }

        .article-content {
            max-width: 760px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow-card);
            border: 1px solid #EAF0F5;
        }

        .article-content p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text);
            margin: 40px 0 16px;
            padding-bottom: 8px;
            border-bottom: 1px solid #EEF2F6;
        }

        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            margin: 32px 0 12px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 24px;
            padding-left: 22px;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
        }

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

        .article-content blockquote {
            margin: 32px 0;
            padding: 20px 24px;
            background: var(--bg);
            border-left: 3px solid var(--primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        .article-content img {
            border-radius: 12px;
            margin: 28px 0;
            max-width: 100%;
        }

        .article-content figure {
            margin: 28px 0;
        }

        .article-content figcaption {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }

        .article-content table {
            width: 100%;
            margin: 28px 0;
            border-collapse: collapse;
            font-size: 14px;
        }

        .article-content table th {
            background: var(--bg);
            font-weight: 600;
            color: var(--text);
        }

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

        .article-content code {
            background: #F4F6F8;
            border-radius: 8px;
            padding: 4px 10px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
            font-size: 14px;
            color: var(--primary-dark);
        }

        .article-content pre {
            background: #F4F6F8;
            border-radius: 8px;
            padding: 16px 20px;
            overflow-x: auto;
            margin: 24px 0;
        }

        .article-content pre code {
            background: none;
            padding: 0;
            font-size: 14px;
            line-height: 1.7;
        }

        /* Article not found */
        .article-not-found {
            max-width: 640px;
            margin: 0 auto;
            background: #fff;
            border: 1px dashed var(--border);
            border-radius: var(--radius-lg);
            padding: 64px 32px;
            text-align: center;
        }

        .article-not-found h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }

        .article-not-found p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        /* ===== Article Footer Area ===== */
        .article-bottom-section {
            padding: 8px 0 64px;
            background: var(--bg);
        }

        .article-bottom-inner {
            max-width: 760px;
            margin: 0 auto;
        }

        .article-tags-row {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 36px;
            padding-top: 12px;
        }

        .article-tags-row .tag-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-right: 4px;
        }

        .article-pagination {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 8px;
        }

        .post-prev,
        .post-next {
            background: #fff;
            border: 1px solid #E5EDF3;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            transition: all .25s ease;
            color: var(--text);
            min-height: 90px;
        }

        .post-prev:hover,
        .post-next:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            color: var(--text);
            transform: translateY(-2px);
        }

        .post-prev .dir-label,
        .post-next .dir-label {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .post-prev .post-title-short,
        .post-next .post-title-short {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .post-next {
            text-align: right;
        }

        .post-next .dir-label {
            justify-content: flex-end;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 72px 0 80px;
            background: #fff;
            border-top: 1px solid #EEF2F6;
        }

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

        .section-head .section-eyebrow {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: block;
        }

        .section-head h2 {
            font-size: clamp(24px, 2.8vw, 32px);
            font-weight: 600;
            line-height: 1.35;
            color: var(--text);
        }

        .section-head .section-sub {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 10px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .related-card {
            background: var(--card-bg);
            border: 1px solid #E5EDF3;
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all .3s ease;
            box-shadow: 0 4px 16px rgba(38, 64, 92, .05);
        }

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

        .related-card .related-cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--alt-bg);
        }

        .related-card .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: all .5s ease;
        }

        .related-card:hover .related-cover img {
            transform: scale(1.04);
        }

        .related-card .related-body {
            padding: 22px 22px 24px;
        }

        .related-card .related-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 10px;
            color: var(--text);
        }

        .related-card .related-body h3 a {
            color: var(--text);
        }

        .related-card .related-body h3 a:hover {
            color: var(--primary);
        }

        .related-card .related-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg);
            padding: 64px 0;
        }

        .cta-inner {
            background: var(--primary);
            border-radius: 20px;
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 360px;
            height: 100%;
            background: url('/assets/images/backpic/back-1.webp') no-repeat right center / cover;
            opacity: .08;
            pointer-events: none;
        }

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

        .cta-inner .cta-text h2 {
            font-size: clamp(20px, 2.4vw, 28px);
            font-weight: 600;
            color: #fff;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .cta-inner .cta-text p {
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            line-height: 1.7;
        }

        .cta-inner .btn {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1D2D3F;
            padding: 72px 0 24px;
            color: #A3B3C2;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand .brand-text {
            font-size: 17px;
            font-weight: 600;
            color: #F4F8FB;
            display: block;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: #8CA0B4;
            max-width: 300px;
            margin-bottom: 18px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            color: #C5D4E2;
            font-size: 14px;
            transition: all .25s ease;
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #E8EEF4;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            font-size: 13px;
            color: #8CA0B4;
            transition: all .2s ease;
        }

        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: #6F8296;
        }

        .footer-bottom a {
            color: #8CA0B4;
            margin-left: 16px;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Bottom CTA Bar ===== */
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid #E2EAF2;
            display: flex;
            align-items: center;
            z-index: 90;
        }

        .bottom-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .bottom-bar .bb-text {
            font-size: 14px;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .bottom-bar .btn {
            flex-shrink: 0;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

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

            .related-card:last-child {
                grid-column: span 2;
            }
        }

        @media screen and (max-width: 767px) {
            body {
                padding-bottom: 68px;
            }

            .header-inner {
                height: 68px;
            }

            .site-nav {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 16px 24px 32px;
                border-bottom: 1px solid #E5EDF3;
                box-shadow: 0 12px 32px rgba(38, 64, 92, .12);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all .3s ease;
                z-index: 99;
            }

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

            .site-nav a {
                display: block;
                width: 100%;
                padding: 14px 0;
                font-size: 16px;
                border-bottom: 1px solid #F0F4F8;
            }

            .site-nav a.active::after {
                display: none;
            }

            .site-nav a.active {
                color: var(--primary);
                font-weight: 600;
            }

            .site-nav .nav-cta-btn {
                width: 100%;
                justify-content: center;
                margin-top: 16px;
                border-radius: var(--radius-md);
            }

            .mobile-menu-toggle {
                display: block;
            }

            .article-header-section {
                padding: 36px 0 16px;
            }

            .article-content {
                padding: 28px 20px;
                border-radius: 12px;
            }

            .article-content p {
                font-size: 15px;
            }

            .article-pagination {
                grid-template-columns: 1fr;
            }

            .post-next {
                text-align: left;
            }

            .post-next .dir-label {
                justify-content: flex-start;
            }

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

            .related-card:last-child {
                grid-column: auto;
            }

            .related-card .related-cover {
                aspect-ratio: 16 / 9;
            }

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

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

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

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .bottom-bar {
                height: 68px;
            }

            .bottom-bar .bb-text {
                font-size: 13px;
            }

            .bottom-bar .btn {
                padding: 10px 20px;
                font-size: 13px;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .article-header-inner h1 {
                font-size: 26px;
                line-height: 1.4;
            }

            .article-meta {
                gap: 10px;
            }

            .article-meta .meta-divider {
                display: none;
            }

            .article-meta .meta-item {
                background: #F1F5F9;
                border-radius: 999px;
                padding: 2px 12px;
                font-size: 12px;
            }

            .article-cover-wrap {
                margin-top: 24px;
            }

            .article-cover-wrap img {
                aspect-ratio: 16 / 10;
                border-radius: 12px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .cta-inner {
                padding: 28px 20px;
            }
        }

        /* ===== Focus states ===== */
        .btn:focus-visible,
        .site-nav a:focus-visible,
        .site-logo:focus-visible,
        .mobile-menu-toggle:focus-visible,
        .related-card a:focus-visible,
        .post-prev:focus-visible,
        .post-next:focus-visible,
        .footer-bottom a:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 3px;
        }

        .nav-cta-btn {
            min-height: 44px;
        }

        .site-nav a {
            min-height: 32px;
            display: inline-flex;
            align-items: center;
        }

/* roulang page: category2 */
:root {
            --primary: #2D7CB5;
            --primary-dark: #1E5E8D;
            --primary-light: #74A9CF;
            --page-bg: #F6F9FC;
            --card-bg: #FFFFFF;
            --alt-bg: #ECF3F9;
            --text-main: #263646;
            --text-sub: #50616F;
            --text-muted: #8A9AAA;
            --line: #DAE4EE;
            --accent: #DD9B45;
            --shadow: 0 8px 30px rgba(38, 64, 92, 0.08);
            --shadow-hover: 0 12px 36px rgba(38, 64, 92, 0.13);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 999px;
            --container: 1240px;
            --space-section: clamp(64px, 8vw, 110px);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--page-bg);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 15px;
            padding-bottom: 64px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid #E5EDF3;
            position: sticky;
            top: 0;
            z-index: 100;
            height: 76px;
            display: flex;
            align-items: center;
        }

        .site-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-logo .brand-mark {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 700;
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }

        .site-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            padding: 8px 0;
            position: relative;
            transition: color 0.25s ease;
        }

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

        .site-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .site-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .nav-cta-btn {
            display: inline-block;
            padding: 9px 24px;
            border: 1px solid var(--primary);
            border-radius: var(--radius-md);
            color: var(--primary) !important;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.25s ease;
            background: transparent;
        }

        .nav-cta-btn:hover {
            background: var(--primary);
            color: #fff !important;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 10px;
            border: none;
            background: transparent;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
        }

        /* ===== 页面头部条 ===== */
        .page-hero {
            background: linear-gradient(135deg, #FFFFFF 0%, #F0F7FC 100%);
            padding: clamp(50px, 7vw, 90px) 0;
            text-align: center;
            border-bottom: 1px solid var(--line);
        }

        .page-hero .page-tag {
            display: inline-block;
            background: #E8F1F9;
            color: var(--primary);
            border-radius: var(--radius-sm);
            padding: 5px 16px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.05em;
            margin-bottom: 20px;
        }

        .page-hero h1 {
            font-size: clamp(30px, 4.2vw, 46px);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            max-width: 860px;
            margin: 0 auto 18px;
        }

        .page-hero h1 span {
            color: var(--primary);
        }

        .page-hero .lead {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-sub);
            max-width: 720px;
            margin: 0 auto;
        }

        .page-hero .hero-meta {
            display: flex;
            justify-content: center;
            gap: 36px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .page-hero .hero-meta span {
            font-size: 13px;
            color: var(--text-muted);
        }

        .page-hero .hero-meta strong {
            color: var(--accent);
            font-size: 20px;
            margin-right: 4px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: clamp(50px, 7vw, 90px) 0;
        }

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

        .section-white {
            background: #fff;
        }

        .section-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: clamp(24px, 2.8vw, 34px);
            font-weight: 600;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-sub);
            max-width: 700px;
            line-height: 1.8;
            margin-bottom: 40px;
        }

        /* ===== 安全体系概览 ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .overview-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .overview-media::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(43, 108, 147, 0.06);
            z-index: 1;
            pointer-events: none;
        }

        .overview-media img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
        }

        .overview-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.5;
        }

        .overview-content p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .overview-points {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .overview-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 10px;
        }

        .overview-points li::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary-light);
            margin-top: 10px;
            flex-shrink: 0;
        }

        /* ===== 核心安全能力 2x2 ===== */
        .capability-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .capability-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 36px;
            border: 1px solid var(--line);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .capability-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .capability-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: #C5D8E8;
        }

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

        .capability-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: #E8F1F9;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 22px;
            color: var(--primary);
            font-size: 22px;
        }

        .capability-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .capability-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .capability-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        /* ===== 安全机制资源卡 ===== */
        .resource-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .resource-row {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: 14px;
            padding: 24px 28px;
            transition: all 0.3s ease;
        }

        .resource-row:hover {
            box-shadow: var(--shadow-hover);
            border-color: #C5D8E8;
        }

        .resource-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: #EAF2F9;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .resource-content {
            flex: 1;
        }

        .resource-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .resource-content p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
        }

        .resource-link {
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .resource-link i {
            transition: transform 0.2s ease;
        }

        .resource-link:hover i {
            transform: translateX(3px);
        }

        /* ===== 安全流程步骤 ===== */
        .steps-section {
            padding: var(--space-section) 0;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 40px;
        }

        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--line);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .step-num {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .step-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--space-section) 0;
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-list {
            margin-top: 40px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            margin-bottom: 14px;
            padding: 0 24px;
            transition: box-shadow 0.25s ease, border-color 0.25s ease;
        }

        .faq-item.active {
            border-color: var(--primary-light);
            box-shadow: var(--shadow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            user-select: none;
            min-height: 44px;
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #EAF2F9;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform 0.2s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding-bottom: 24px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            border-top: 1px solid var(--line);
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--primary);
            border-radius: 20px;
            padding: clamp(36px, 5vw, 56px);
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: clamp(48px, 6vw, 72px);
            box-shadow: 0 12px 40px rgba(45, 124, 181, 0.25);
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.04);
            background-image: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
            pointer-events: none;
        }

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

        .cta-content h2 {
            color: #fff;
            font-size: clamp(22px, 2.5vw, 30px);
            font-weight: 600;
            margin-bottom: 8px;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
        }

        .cta-btn {
            display: inline-block;
            background: #fff;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
            position: relative;
            z-index: 1;
            white-space: nowrap;
        }

        .cta-btn:hover {
            background: #F0F6FB;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
            color: var(--primary);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #1D2D3F;
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 14px;
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            transition: color 0.2s ease;
        }

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

        .footer-bottom {
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom div {
            display: flex;
            gap: 20px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 底部固定转化条 ===== */
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--line);
            z-index: 99;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 32px;
        }

        .bottom-bar-text {
            font-size: 14px;
            color: var(--text-main);
            font-weight: 500;
        }

        .bottom-bar-btn {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 28px;
            border-radius: var(--radius-md);
            transition: background 0.3s ease;
        }

        .bottom-bar-btn:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .site-nav {
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
            .site-nav {
                display: none;
                position: absolute;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid var(--line);
                box-shadow: 0 12px 32px rgba(0,0,0,0.08);
                gap: 0;
            }
            .site-nav.open {
                display: flex;
            }
            .site-nav a {
                padding: 14px 0;
                border-bottom: 1px solid #F0F4F8;
                width: 100%;
                font-size: 15px;
            }
            .site-nav a:last-child {
                border-bottom: none;
            }
            .nav-cta-btn {
                margin-top: 12px;
                text-align: center;
                display: block;
            }
            .nav-toggle {
                display: flex;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .resource-row {
                flex-wrap: wrap;
                padding: 18px;
            }
            .resource-link {
                margin-left: 0;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-block {
                flex-direction: column;
                text-align: center;
            }
            .cta-content p {
                max-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .bottom-bar {
                height: 68px;
                padding: 0 16px;
            }
            .bottom-bar-btn {
                padding: 8px 18px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 28px;
            }
            .page-hero .lead {
                font-size: 14px;
            }
            .hero-meta {
                gap: 16px;
            }
            .capability-card {
                padding: 24px;
            }
            .resource-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .resource-link {
                margin-top: 8px;
            }
            .section-title {
                font-size: 22px;
            }
            .bottom-bar-text {
                font-size: 13px;
            }
        }