/* roulang page: index */
:root{
    --bg-primary:#0B0F1A;
    --bg-card:#111827;
    --bg-card-hover:#1A2332;
    --bg-deep:#080B13;
    --primary:#00E5A0;
    --primary-dark:#00C98A;
    --secondary:#8B5CF6;
    --accent:#FF2D78;
    --text-primary:#E6EDF3;
    --text-secondary:#8B9BB4;
    --text-weak:#5B6B84;
    --border:rgba(255,255,255,0.08);
    --border-neon:rgba(0,229,160,0.25);
    --radius-card:12px;
    --radius-btn:8px;
    --radius-tag:999px;
    --shadow-card:0 8px 30px rgba(0,0,0,0.35);
    --shadow-neon:0 0 20px rgba(0,229,160,0.08);
    --container:1200px;
    --font-family:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
    --transition:all 0.3s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
    font-family:var(--font-family);
    background:var(--bg-primary);
    color:var(--text-primary);
    line-height:1.75;
    font-size:16px;
    overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--radius-card);}
a{color:var(--primary);text-decoration:none;transition:var(--transition);}
a:hover{color:var(--primary-dark);}
ul{list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
::selection{background:rgba(0,229,160,0.2);color:#fff;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:90px 0;}
.section-header{text-align:center;margin-bottom:56px;}
.section-title{
    font-size:32px;font-weight:700;color:var(--text-primary);
    letter-spacing:0.5px;line-height:1.3;margin-bottom:14px;
}
.section-subtitle{
    font-size:16px;color:var(--text-secondary);max-width:640px;margin:0 auto;line-height:1.7;
}
.text-primary{color:var(--primary);}

/* 导航 */
.site-header{
    position:fixed;top:0;left:0;width:100%;height:60px;z-index:1000;
    background:rgba(11,15,26,0.92);backdrop-filter:blur(12px);
    border-bottom:1px solid rgba(0,229,160,0.18);
    box-shadow:0 1px 20px rgba(0,0,0,0.4);
}
.header-inner{
    max-width:var(--container);height:60px;margin:0 auto;padding:0 24px;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.logo{
    font-size:20px;font-weight:700;color:var(--text-primary);white-space:nowrap;
    display:flex;align-items:center;gap:10px;letter-spacing:0.3px;
}
.logo i{color:var(--primary);font-size:24px;}
.logo span{
    background:linear-gradient(90deg,var(--primary),var(--secondary));
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.main-nav{
    display:flex;align-items:center;gap:28px;position:relative;
}
.nav-link{
    font-size:15px;color:var(--text-secondary);font-weight:500;
    padding:6px 2px;position:relative;letter-spacing:0.3px;
}
.nav-link::after{
    content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;
    background:linear-gradient(90deg,var(--primary),var(--secondary));
    border-radius:2px;transition:var(--transition);
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--primary);}
.nav-link.active::after{width:100%;box-shadow:0 0 10px rgba(0,229,160,0.5);}
.btn{
    display:inline-block;font-weight:600;font-size:15px;
    border-radius:var(--radius-btn);cursor:pointer;border:none;
    padding:10px 22px;transition:var(--transition);text-align:center;
    line-height:1.4;
}
.btn:focus-visible{
    outline:2px solid var(--primary);outline-offset:2px;
}
.btn-primary{
    background:linear-gradient(135deg,var(--primary),var(--primary-dark));
    color:var(--bg-primary);box-shadow:0 4px 14px rgba(0,229,160,0.15);
}
.btn-primary:hover{
    background:linear-gradient(135deg,#00F5B0,var(--primary-dark));
    box-shadow:0 0 16px rgba(0,229,160,0.45);transform:translateY(-1px);color:var(--bg-primary);
}
.btn-primary:active{transform:translateY(1px) scale(0.98);}
.btn-outline{
    background:transparent;border:1px solid var(--border-neon);color:var(--primary);
}
.btn-outline:hover{
    background:rgba(0,229,160,0.1);border-color:var(--primary);box-shadow:0 0 12px rgba(0,229,160,0.15);
}
.btn-outline:active{transform:scale(0.98);}
.btn-lg{padding:14px 34px;font-size:16px;border-radius:10px;}
.nav-cta{padding:8px 20px;font-size:14px;margin-left:8px;}
.hamburger{
    display:none;background:none;border:none;cursor:pointer;padding:8px;width:40px;height:40px;
    flex-direction:column;justify-content:center;gap:5px;border-radius:6px;
}
.hamburger:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.hamburger span{
    display:block;width:22px;height:2px;background:var(--text-primary);
    border-radius:2px;transition:var(--transition);
}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* Hero */
.hero{
    position:relative;min-height:100vh;display:flex;align-items:center;
    background:url('/assets/images/backpic/back-1.webp') center 40%/cover no-repeat;
    padding:80px 0 60px;margin-top:60px;
}
.hero-overlay{
    position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(11,15,26,0.94) 20%,rgba(11,15,26,0.7) 50%,rgba(11,15,26,0.4) 100%);
}
.hero-inner{
    position:relative;z-index:2;display:flex;align-items:center;gap:48px;
    max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;
}
.hero-content{flex:1.1;max-width:620px;}
.hero-badge{
    display:inline-flex;align-items:center;gap:8px;background:rgba(0,229,160,0.1);
    border:1px solid var(--border-neon);padding:6px 16px;border-radius:var(--radius-tag);
    font-size:13px;color:var(--primary);margin-bottom:24px;font-weight:500;
}
.hero-badge i{font-size:13px;}
.hero h1{
    font-size:44px;font-weight:700;line-height:1.25;color:var(--text-primary);
    text-shadow:0 0 30px rgba(0,229,160,0.35);margin-bottom:20px;letter-spacing:0.5px;
}
.hero-subtitle{
    font-size:17px;color:var(--text-secondary);line-height:1.8;margin-bottom:32px;max-width:520px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:36px;}
.hero-trust{
    display:flex;gap:24px;flex-wrap:wrap;padding-top:4px;
}
.hero-trust li{
    display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-secondary);
}
.hero-trust li i{color:var(--primary);font-size:15px;}
.hero-visual{flex:0.9;position:relative;}
.hero-visual img{
    width:100%;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,0.5),0 0 40px rgba(0,229,160,0.08);
    border:1px solid var(--border);
}
.hero-visual .hero-img-glow{
    position:absolute;inset:-2px;border-radius:18px;pointer-events:none;
    background:linear-gradient(135deg,rgba(0,229,160,0.15),rgba(139,92,246,0.1));
    filter:blur(24px);z-index:-1;
}

/* 数据条 */
.stats{
    background:var(--bg-deep);border-bottom:1px solid var(--border);padding:48px 0;
}
.stats-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center;
}
.stat-item{padding:8px 0;}
.stat-number{
    font-size:38px;font-weight:800;color:var(--primary);line-height:1.2;
    text-shadow:0 0 20px rgba(0,229,160,0.3);
}
.stat-label{font-size:14px;color:var(--text-secondary);margin-top:8px;letter-spacing:0.5px;}

/* 注册流程 */
.process{
    background:var(--bg-primary);position:relative;
}
.process-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
}
.process-step{
    background:var(--bg-card);border:1px solid var(--border);border-radius:16px;
    padding:38px 30px;position:relative;transition:var(--transition);text-align:center;
}
.process-step:hover{
    background:var(--bg-card-hover);transform:translateY(-4px);
    box-shadow:var(--shadow-card),0 0 24px rgba(0,229,160,0.08);border-color:var(--border-neon);
}
.step-icon{
    width:72px;height:72px;border-radius:16px;margin:0 auto 22px;
    background:rgba(0,229,160,0.1);display:flex;align-items:center;justify-content:center;
    font-size:28px;color:var(--primary);border:1px solid var(--border-neon);
}
.step-num{
    position:absolute;top:18px;right:22px;font-size:14px;font-weight:700;
    color:var(--text-weak);background:rgba(255,255,255,0.04);padding:2px 12px;border-radius:var(--radius-tag);
}
.step-title{font-size:19px;font-weight:600;color:var(--text-primary);margin-bottom:12px;}
.step-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;}

/* 优惠阶梯 */
.benefits{background:var(--bg-deep);}
.benefit-steps{
    display:grid;grid-template-columns:repeat(3,1fr);gap:28px;align-items:stretch;
}
.benefit-step{
    background:var(--bg-card);border:1px solid var(--border);border-radius:16px;
    padding:36px 28px;text-align:center;transition:var(--transition);position:relative;
}
.benefit-step.center{
    transform:scale(1.04);border-color:var(--border-neon);
    box-shadow:0 8px 30px rgba(0,0,0,0.35),0 0 30px rgba(0,229,160,0.1);
    background:linear-gradient(180deg,var(--bg-card),#151D2A);
}
.benefit-step.center:hover{transform:scale(1.04) translateY(-2px);}
.benefit-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);}
.benefit-rank{
    display:inline-block;font-size:13px;font-weight:600;padding:4px 14px;
    border-radius:var(--radius-tag);margin-bottom:18px;
}
.benefit-step.center .benefit-rank{background:linear-gradient(90deg,var(--primary),var(--secondary));color:var(--bg-primary);}
.benefit-step .benefit-rank{background:rgba(255,255,255,0.06);color:var(--text-secondary);}
.benefit-step-name{font-size:20px;font-weight:700;color:var(--text-primary);margin-bottom:12px;}
.benefit-step-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:20px;}
.benefit-step ul{text-align:left;padding:0 8px;margin-bottom:22px;}
.benefit-step ul li{
    font-size:14px;color:var(--text-secondary);padding:6px 0;display:flex;align-items:flex-start;gap:8px;
}
.benefit-step ul li i{color:var(--primary);font-size:13px;margin-top:3px;flex-shrink:0;}
.benefit-step.center ul li{color:var(--text-primary);}

/* 套餐对比 */
.plans{background:var(--bg-primary);}
.plans-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:28px;align-items:stretch;
}
.plan-card{
    background:var(--bg-card);border:1px solid var(--border);border-radius:16px;
    padding:36px 28px;position:relative;transition:var(--transition);display:flex;flex-direction:column;
}
.plan-card.recommended{
    border-color:rgba(139,92,246,0.5);transform:translateY(-20px);
    box-shadow:0 12px 40px rgba(0,0,0,0.4),0 0 30px rgba(139,92,246,0.12);
    background:linear-gradient(180deg,var(--bg-card),#151D2A);
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card),var(--shadow-neon);}
.plan-card.recommended:hover{transform:translateY(-20px) translateY(-4px);box-shadow:0 16px 50px rgba(0,0,0,0.45),0 0 35px rgba(139,92,246,0.15);}
.recommend-badge{
    position:absolute;top:-12px;right:20px;background:var(--accent);color:#fff;
    font-size:12px;font-weight:700;padding:4px 14px;border-radius:6px;
    box-shadow:0 4px 14px rgba(255,45,120,0.3);
}
.plan-name{font-size:21px;font-weight:700;color:var(--text-primary);margin-bottom:6px;}
.plan-desc{font-size:13px;color:var(--text-secondary);margin-bottom:22px;}
.plan-features{flex:1;margin-bottom:28px;}
.plan-feature{
    display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-secondary);
    padding:8px 0;border-bottom:1px solid rgba(255,255,255,0.03);
}
.plan-feature::before{
    font-family:"Font Awesome 6 Free";font-weight:900;font-size:14px;width:20px;text-align:center;
}
.plan-feature.yes::before{content:"\f00c";color:var(--primary);}
.plan-feature.no::before{content:"\f00d";color:var(--text-weak);}
.plan-price{font-size:28px;font-weight:800;color:var(--text-primary);margin-bottom:20px;}
.plan-price small{font-size:13px;color:var(--text-weak);font-weight:400;}
.plan-cta{width:100%;}

/* 限时入口 */
.timelimit{
    background:var(--bg-deep);position:relative;overflow:hidden;padding:80px 0;
}
.timelimit::before{
    content:'';position:absolute;top:-40%;left:20%;width:60%;height:80%;
    background:radial-gradient(ellipse,rgba(0,229,160,0.07),transparent 60%);
    pointer-events:none;
}
.timelimit-inner{position:relative;z-index:2;text-align:center;}
.timelimit-title{
    font-size:34px;font-weight:700;color:var(--text-primary);margin-bottom:12px;
}
.timelimit-title span{
    color:var(--accent);font-weight:800;
}
.timelimit-subtitle{font-size:16px;color:var(--text-secondary);margin-bottom:36px;}
.countdown{
    display:flex;justify-content:center;gap:20px;margin-bottom:40px;
}
.countdown-item{
    background:var(--bg-card);border:1px solid var(--border-neon);border-radius:12px;
    min-width:88px;padding:20px 12px;text-align:center;
    box-shadow:0 4px 20px rgba(0,0,0,0.3);
}
.countdown-number{
    font-size:40px;font-weight:800;color:var(--accent);line-height:1.2;
    font-variant-numeric:tabular-nums;text-shadow:0 0 20px rgba(255,45,120,0.3);
}
.countdown-label{font-size:13px;color:var(--text-secondary);margin-top:6px;}
.timelimit-cta{
    font-size:17px;padding:16px 42px;border-radius:50px;
    background:linear-gradient(135deg,var(--primary),var(--secondary));
    color:var(--bg-primary);border:none;font-weight:700;cursor:pointer;
    box-shadow:0 4px 24px rgba(0,229,160,0.3);transition:var(--transition);
}
.timelimit-cta:hover{
    transform:translateY(-2px);box-shadow:0 6px 30px rgba(0,229,160,0.45);color:var(--bg-primary);
}
.timelimit-cta:active{transform:translateY(1px);}

/* 资讯 */
.news{background:var(--bg-primary);}
.news-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.news-card{
    display:flex;gap:18px;background:var(--bg-card);border:1px solid var(--border);
    border-radius:14px;padding:24px;transition:var(--transition);overflow:hidden;
}
.news-card:hover{
    background:var(--bg-card-hover);transform:translateY(-3px);
    border-color:var(--border-neon);box-shadow:var(--shadow-card),var(--shadow-neon);
}
.news-thumb{
    width:64px;height:64px;border-radius:12px;object-fit:cover;flex-shrink:0;
    background:rgba(255,255,255,0.04);
}
.news-body{flex:1;display:flex;flex-direction:column;}
.news-meta{display:flex;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap;}
.news-tag{
    font-size:12px;color:var(--primary);background:rgba(0,229,160,0.1);
    padding:2px 10px;border-radius:4px;font-weight:500;
}
.news-time{font-size:12px;color:var(--text-weak);}
.news-title{
    font-size:16px;font-weight:600;color:var(--text-primary);line-height:1.5;
    margin-bottom:6px;transition:var(--transition);
}
.news-card:hover .news-title{color:var(--primary);}
.news-summary{
    font-size:14px;color:var(--text-secondary);line-height:1.6;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.read-more{
    margin-top:auto;font-size:13px;color:var(--primary);align-self:flex-end;
    display:inline-flex;align-items:center;gap:4px;
}
.read-more:hover{gap:8px;}
.empty-state{
    min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;
    border:1px dashed var(--border-neon);border-radius:16px;
    background:rgba(0,229,160,0.02);grid-column:1/-1;
}
.empty-state i{
    font-size:42px;color:var(--primary);margin-bottom:16px;opacity:0.6;
    text-shadow:0 0 20px rgba(0,229,160,0.3);
}
.empty-state p{font-size:15px;color:var(--text-secondary);}

/* FAQ */
.faq{background:var(--bg-deep);}
.faq-list{max-width:760px;margin:0 auto;}
.faq-item{
    background:var(--bg-card);border:1px solid var(--border);border-radius:12px;
    margin-bottom:12px;overflow:hidden;transition:var(--transition);
}
.faq-item:hover{border-color:var(--border-neon);}
.faq-item.active{border-color:var(--border-neon);box-shadow:0 0 16px rgba(0,229,160,0.05);}
.faq-question{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    width:100%;padding:18px 20px;background:none;border:none;cursor:pointer;
    text-align:left;font-size:15px;font-weight:500;color:var(--text-primary);transition:var(--transition);
}
.faq-question:hover{color:var(--primary);}
.faq-question:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:12px;}
.faq-icon{
    width:28px;height:28px;flex-shrink:0;border-radius:50%;
    background:rgba(0,229,160,0.1);border:1px solid var(--border-neon);
    display:flex;align-items:center;justify-content:center;font-size:14px;
    color:var(--primary);transition:transform 0.3s ease;
}
.faq-item.active .faq-icon{transform:rotate(45deg);border-color:var(--primary);}
.faq-answer{
    padding:0 20px;max-height:0;overflow:hidden;transition:max-height 0.35s ease;
    font-size:14px;color:var(--text-secondary);line-height:1.75;
    background:rgba(0,229,160,0.02);
}
.faq-item.active .faq-answer{padding:0 20px 16px;max-height:400px;}
.faq-answer p{padding-top:4px;}

/* 咨询表单 */
.contact{
    background:var(--bg-primary);position:relative;
}
.contact-grid{
    display:grid;grid-template-columns:1fr 1.2fr;gap:50px;align-items:center;
}
.contact-info h2{font-size:32px;font-weight:700;color:var(--text-primary);margin-bottom:16px;}
.contact-info p{font-size:15px;color:var(--text-secondary);line-height:1.8;margin-bottom:24px;}
.contact-features{list-style:none;}
.contact-features li{
    display:flex;align-items:center;gap:12px;font-size:14px;color:var(--text-secondary);
    padding:8px 0;
}
.contact-features li i{color:var(--primary);font-size:15px;}
.contact-form{
    background:var(--bg-card);border:1px solid var(--border);border-radius:16px;
    padding:38px 34px;box-shadow:var(--shadow-card);
}
.form-group{margin-bottom:22px;}
.form-label{
    display:block;font-size:12px;color:var(--text-weak);margin-bottom:8px;font-weight:500;
    letter-spacing:0.5px;
}
.form-input,.form-select{
    width:100%;height:44px;background:var(--bg-primary);
    border:1px solid var(--border);border-radius:8px;padding:0 14px;
    font-size:14px;color:var(--text-primary);transition:var(--transition);
    appearance:none;-webkit-appearance:none;
}
.form-select{
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238B9BB4' d='M6 8.5L1 3.5h10L6 8.5z'/%3E%3C/svg%3E");
    background-repeat:no-repeat;background-position:right 14px center;cursor:pointer;
}
.form-input::placeholder{color:var(--text-weak);}
.form-input:focus,.form-select:focus{
    outline:none;border-color:var(--primary);box-shadow:0 0 8px rgba(0,229,160,0.3);
}
.form-submit{
    width:100%;height:44px;font-size:15px;font-weight:600;
    background:linear-gradient(135deg,var(--primary),var(--primary-dark));
    color:var(--bg-primary);border:none;border-radius:8px;cursor:pointer;
    transition:var(--transition);
}
.form-submit:hover{
    box-shadow:0 0 16px rgba(0,229,160,0.45);transform:translateY(-1px);
}
.form-submit:active{transform:translateY(1px) scale(0.99);}
.form-tip{font-size:12px;color:var(--text-weak);margin-top:8px;text-align:center;}
.form-success{
    display:none;text-align:center;padding:20px 10px;
}
.form-success.show{display:block;}
.form-success i{font-size:48px;color:var(--primary);margin-bottom:12px;}
.form-success p{font-size:15px;color:var(--text-primary);}

/* CTA */
.cta-section{
    background:var(--bg-deep);padding:70px 0;border-top:1px solid var(--border);
}
.cta-inner{text-align:center;position:relative;z-index:2;}
.cta-inner h2{font-size:32px;font-weight:700;color:var(--text-primary);margin-bottom:12px;}
.cta-inner p{font-size:16px;color:var(--text-secondary);margin-bottom:30px;}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{
    background:var(--bg-deep);padding:56px 0 24px;border-top:1px solid rgba(0,229,160,0.15);
}
.footer-inner{
    max-width:var(--container);margin:0 auto;padding:0 24px;
    display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:40px;margin-bottom:36px;
}
.footer-brand-name{
    font-size:20px;font-weight:700;color:var(--text-primary);margin-bottom:14px;
    display:flex;align-items:center;gap:10px;
}
.footer-brand-name i{color:var(--primary);}
.footer-brand-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;}
.footer-title{font-size:15px;font-weight:600;color:var(--text-primary);margin-bottom:16px;}
.footer-links a{
    display:block;font-size:14px;color:var(--text-secondary);padding:5px 0;transition:var(--transition);
}
.footer-links a:hover{color:var(--primary);padding-left:6px;}
.footer-statement{font-size:13px;color:var(--text-weak);line-height:1.7;}
.footer-bottom{
    max-width:var(--container);margin:0 auto;padding:20px 24px 0;
    border-top:1px solid var(--border);text-align:center;
}
.footer-bottom p{font-size:13px;color:var(--text-weak);}
.footer-bottom a{color:var(--text-secondary);font-size:13px;}
.footer-bottom a:hover{color:var(--primary);}

/* 响应式 */
@media(max-width:1024px){
    .hero h1{font-size:36px;}
    .hero-inner{gap:28px;}
    .stats-grid{gap:20px;}
    .stat-number{font-size:32px;}
    .process-grid{grid-template-columns:repeat(3,1fr);gap:16px;}
    .benefit-steps{grid-template-columns:repeat(3,1fr);gap:16px;}
    .plans-grid{grid-template-columns:repeat(3,1fr);gap:16px;}
    .news-grid{grid-template-columns:1fr;}
    .contact-grid{gap:28px;}
}
@media(max-width:768px){
    .section{padding:60px 0;}
    .main-nav{
        display:none;position:fixed;top:60px;left:0;width:100%;height:calc(100vh - 60px);
        background:var(--bg-primary);flex-direction:column;align-items:center;
        justify-content:center;gap:32px;z-index:999;
    }
    .main-nav.open{display:flex;}
    .main-nav .nav-link{font-size:22px;padding:10px 0;}
    .nav-cta{display:none;}
    .hamburger{display:flex;}
    .hero{min-height:auto;padding:90px 0 50px;}
    .hero-inner{flex-direction:column;text-align:center;padding-top:20px;}
    .hero-content{max-width:100%;}
    .hero h1{font-size:30px;}
    .hero-subtitle{margin-left:auto;margin-right:auto;}
    .hero-actions{justify-content:center;}
    .hero-trust{justify-content:center;gap:16px;}
    .hero-visual{width:100%;max-width:440px;margin:0 auto;}
    .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px;}
    .process-grid{grid-template-columns:1fr;max-width:380px;margin:0 auto;}
    .benefit-steps{grid-template-columns:1fr;max-width:420px;margin:0 auto;}
    .benefit-step.center{transform:scale(1);}
    .benefit-step.center:hover{transform:translateY(-4px);}
    .plans-grid{grid-template-columns:1fr;max-width:420px;margin:0 auto;}
    .plan-card.recommended{transform:translateY(0);}
    .plan-card.recommended:hover{transform:translateY(-4px);}
    .news-grid{max-width:480px;margin:0 auto;}
    .contact-grid{grid-template-columns:1fr;}
    .contact-form{padding:28px 20px;}
    .countdown{gap:12px;}
    .countdown-item{min-width:70px;padding:16px 8px;}
    .countdown-number{font-size:30px;}
    .footer-inner{grid-template-columns:1fr;gap:28px;}
    .timelimit-title{font-size:28px;}
    .cta-inner h2{font-size:28px;}
}
@media(max-width:520px){
    .container{padding:0 16px;}
    .header-inner{padding:0 16px;}
    .logo{font-size:16px;}
    .logo i{font-size:20px;}
    .hero{padding:70px 0 40px;}
    .hero h1{font-size:26px;}
    .hero-subtitle{font-size:15px;}
    .hero-actions .btn{width:100%;text-align:center;}
    .hero-trust{flex-direction:column;align-items:center;gap:10px;}
    .stat-number{font-size:26px;}
    .section-title{font-size:26px;}
    .news-card{flex-direction:column;padding:18px;}
    .news-thumb{width:100%;height:140px;border-radius:8px;}
    .faq-question{font-size:14px;padding:15px 14px;}
    .contact-info h2{font-size:26px;}
    .countdown{gap:8px;flex-wrap:wrap;}
    .countdown-item{min-width:64px;padding:14px 6px;}
    .countdown-number{font-size:26px;}
    .timelimit-cta{width:100%;text-align:center;}
    .cta-actions .btn{width:100%;text-align:center;}
    .footer-bottom{padding:16px 16px 0;}
}

/* roulang page: category1 */
:root {
        --bg-dark: #0B0F1A;
        --bg-card: #111827;
        --bg-hover: #1A2332;
        --primary: #00E5A0;
        --primary-hover: #00C98A;
        --secondary: #8B5CF6;
        --accent: #FF2D78;
        --text-main: #E6EDF3;
        --text-sub: #8B9BB4;
        --text-weak: #5B6B84;
        --border: rgba(255, 255, 255, 0.08);
        --border-neon: rgba(0, 229, 160, 0.25);
        --radius-lg: 12px;
        --radius-md: 8px;
        --radius-tag: 999px;
        --shadow-normal: 0 8px 30px rgba(0, 0, 0, 0.35);
        --shadow-neon: 0 0 20px rgba(0, 229, 160, 0.08);
        --glow-primary: 0 0 16px rgba(0, 229, 160, 0.45);
        --container: 1200px;
        --space-section: 80px;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        font-size: 16px;
        line-height: 1.75;
        background-color: var(--bg-dark);
        color: var(--text-main);
        -webkit-font-smoothing: antialiased;
    }

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

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

    button,
    input,
    select,
    textarea {
        font-family: inherit;
        font-size: inherit;
        border: none;
        outline: none;
    }

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

    .container {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ========== 导航栏 ========== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background-color: rgba(11, 15, 26, 0.92);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-neon);
    }

    .header-inner {
        height: 60px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
    }

    .logo {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-main);
        display: flex;
        align-items: center;
        gap: 8px;
        white-space: nowrap;
        letter-spacing: 0.5px;
    }

    .logo i {
        color: var(--primary);
        font-size: 20px;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .main-nav .nav-link {
        padding: 8px 16px;
        font-size: 14px;
        color: var(--text-sub);
        border-radius: 6px;
        position: relative;
        transition: color 0.25s ease, background 0.25s ease;
    }

    .main-nav .nav-link:hover {
        color: var(--primary);
        background: rgba(0, 229, 160, 0.06);
    }

    .main-nav .nav-link.active {
        color: var(--primary);
        background: rgba(0, 229, 160, 0.08);
    }

    .main-nav .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 12px;
        right: 12px;
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        border-radius: 2px;
        box-shadow: 0 0 8px rgba(0, 229, 160, 0.4);
    }

    .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 20px;
        font-size: 14px;
        font-weight: 600;
        color: #0B0F1A;
        background: linear-gradient(135deg, #00E5A0, #00C98A);
        border-radius: var(--radius-md);
        box-shadow: 0 0 12px rgba(0, 229, 160, 0.2);
        transition: all 0.25s ease;
        white-space: nowrap;
    }

    .nav-cta:hover {
        box-shadow: 0 0 20px rgba(0, 229, 160, 0.45);
        transform: translateY(-1px);
        color: #0B0F1A;
    }

    .nav-cta:active {
        transform: translateY(1px);
        box-shadow: 0 0 10px rgba(0, 229, 160, 0.3);
    }

    /* 移动端菜单 */
    .menu-toggle {
        display: none;
        background: none;
        border: none;
        cursor: pointer;
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        transition: background 0.2s ease;
    }

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

    .menu-toggle-icon {
        position: relative;
        width: 22px;
        height: 2px;
        background: var(--text-main);
        border-radius: 2px;
        transition: all 0.3s ease;
    }

    .menu-toggle-icon::before,
    .menu-toggle-icon::after {
        content: '';
        position: absolute;
        left: 0;
        width: 22px;
        height: 2px;
        background: var(--text-main);
        border-radius: 2px;
        transition: all 0.3s ease;
    }

    .menu-toggle-icon::before {
        top: -7px;
    }

    .menu-toggle-icon::after {
        top: 7px;
    }

    .menu-toggle.open .menu-toggle-icon {
        background: transparent;
    }

    .menu-toggle.open .menu-toggle-icon::before {
        top: 0;
        transform: rotate(45deg);
        background: var(--primary);
    }

    .menu-toggle.open .menu-toggle-icon::after {
        top: 0;
        transform: rotate(-45deg);
        background: var(--primary);
    }

    /* ========== 分类横幅 Hero ========== */
    .category-hero {
        position: relative;
        padding: 140px 0 80px;
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        overflow: hidden;
    }

    .category-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(11, 15, 26, 0.95), rgba(11, 15, 26, 0.7) 60%, rgba(11, 15, 26, 0.5));
        z-index: 1;
    }

    .category-hero::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
        z-index: 2;
    }

    .category-hero .hero-inner {
        position: relative;
        z-index: 2;
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }

    .category-hero .hero-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(0, 229, 160, 0.1);
        border: 1px solid var(--border-neon);
        color: var(--primary);
        font-size: 13px;
        padding: 4px 14px;
        border-radius: var(--radius-tag);
        margin-bottom: 16px;
    }

    .category-hero h1 {
        font-size: 40px;
        line-height: 1.2;
        margin-bottom: 12px;
        max-width: 700px;
        text-shadow: 0 0 30px rgba(0, 229, 160, 0.25);
    }

    .category-hero .hero-subtitle {
        font-size: 16px;
        line-height: 1.8;
        color: var(--text-sub);
        max-width: 640px;
        margin-bottom: 28px;
    }

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

    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        font-size: 15px;
        font-weight: 600;
        color: #0B0F1A;
        background: linear-gradient(135deg, #00E5A0, #00C98A);
        border-radius: var(--radius-md);
        box-shadow: 0 0 12px rgba(0, 229, 160, 0.2);
        transition: all 0.25s ease;
        cursor: pointer;
        border: none;
    }

    .btn-primary:hover {
        box-shadow: 0 0 24px rgba(0, 229, 160, 0.5);
        transform: translateY(-1px);
        color: #0B0F1A;
    }

    .btn-primary:active {
        transform: translateY(1px);
        box-shadow: 0 0 12px rgba(0, 229, 160, 0.3);
    }

    .btn-secondary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        font-size: 15px;
        font-weight: 500;
        color: var(--primary);
        background: transparent;
        border: 1px solid var(--border-neon);
        border-radius: var(--radius-md);
        transition: all 0.25s ease;
        cursor: pointer;
    }

    .btn-secondary:hover {
        background: rgba(0, 229, 160, 0.1);
        box-shadow: 0 0 12px rgba(0, 229, 160, 0.2);
        color: var(--primary);
    }

    .btn-secondary:active {
        transform: translateY(1px);
    }

    /* ========== 信息快讯条 ========== */
    .ticker-bar {
        background: linear-gradient(90deg, rgba(0, 229, 160, 0.06), rgba(139, 92, 246, 0.06));
        border-bottom: 1px solid var(--border);
        padding: 10px 0;
        overflow: hidden;
    }

    .ticker-inner {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 13px;
        color: var(--text-sub);
        white-space: nowrap;
    }

    .ticker-inner .ticker-label {
        background: var(--accent);
        color: #fff;
        font-size: 11px;
        padding: 2px 10px;
        border-radius: var(--radius-tag);
        font-weight: 600;
        letter-spacing: 1px;
    }

    .ticker-text {
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* ========== 板块通用 ========== */
    .section {
        padding: var(--space-section) 0;
    }

    .section-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin-bottom: 40px;
        gap: 20px;
        flex-wrap: wrap;
    }

    .section-header h2 {
        font-size: 30px;
        position: relative;
        padding-bottom: 12px;
    }

    .section-header h2::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 42px;
        height: 3px;
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        border-radius: 3px;
    }

    .section-header .section-desc {
        color: var(--text-sub);
        font-size: 14px;
        max-width: 400px;
        line-height: 1.7;
    }

    /* ========== 安全服务卡片 ========== */
    .security-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .security-card {
        background: var(--bg-card);
        border-radius: var(--radius-lg);
        padding: 36px 28px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-normal);
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .security-card:hover {
        background: var(--bg-hover);
        transform: translateY(-4px);
        box-shadow: var(--shadow-normal), var(--shadow-neon);
        border-color: var(--border-neon);
    }

    .security-card .card-icon {
        width: 56px;
        height: 56px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        margin-bottom: 20px;
        background: rgba(0, 229, 160, 0.1);
        color: var(--primary);
        border: 1px solid var(--border-neon);
    }

    .security-card:nth-child(2) .card-icon {
        background: rgba(139, 92, 246, 0.12);
        color: var(--secondary);
        border-color: rgba(139, 92, 246, 0.25);
    }

    .security-card:nth-child(3) .card-icon {
        background: rgba(255, 45, 120, 0.1);
        color: var(--accent);
        border-color: rgba(255, 45, 120, 0.22);
    }

    .security-card h3 {
        font-size: 20px;
        margin-bottom: 12px;
    }

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

    .security-card .card-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        margin-top: 18px;
        font-size: 14px;
        color: var(--primary);
        font-weight: 500;
        transition: gap 0.2s ease;
    }

    .security-card .card-link:hover {
        gap: 10px;
        color: var(--primary-hover);
    }

    /* 第三张卡片差异化 */
    .security-card:nth-child(3) {
        border-color: rgba(255, 45, 120, 0.2);
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(255, 45, 120, 0.06);
    }

    .security-card:nth-child(3) .card-tag {
        position: absolute;
        top: 14px;
        right: -30px;
        background: var(--accent);
        color: #fff;
        font-size: 11px;
        font-weight: 600;
        padding: 4px 32px;
        transform: rotate(45deg);
        letter-spacing: 0.5px;
    }

    /* ========== 适用场景 ========== */
    .scenario-section {
        background: var(--bg-card);
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }

    .scenario-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .scenario-card {
        display: flex;
        gap: 20px;
        background: rgba(255, 255, 255, 0.02);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 28px;
        transition: all 0.3s ease;
    }

    .scenario-card:hover {
        border-color: var(--border-neon);
        background: rgba(0, 229, 160, 0.03);
        transform: translateY(-2px);
    }

    .scenario-card .scenario-icon {
        flex-shrink: 0;
        width: 44px;
        height: 44px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        background: rgba(0, 229, 160, 0.08);
        color: var(--primary);
        border: 1px solid var(--border-neon);
    }

    .scenario-card h3 {
        font-size: 17px;
        margin-bottom: 6px;
    }

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

    /* ========== 流程步骤 ========== */
    .flow-section {
        position: relative;
    }

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

    .flow-grid::before {
        content: '';
        position: absolute;
        top: 32px;
        left: 10%;
        right: 10%;
        height: 1px;
        background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
        opacity: 0.15;
    }

    .flow-step {
        text-align: center;
        padding: 0 8px;
        position: relative;
    }

    .flow-step .step-num {
        width: 64px;
        height: 64px;
        margin: 0 auto 16px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        font-weight: 700;
        background: var(--bg-card);
        border: 1px solid var(--border-neon);
        color: var(--primary);
        box-shadow: 0 0 20px rgba(0, 229, 160, 0.1);
        position: relative;
        z-index: 1;
    }

    .flow-step:nth-child(2) .step-num {
        color: var(--secondary);
        border-color: rgba(139, 92, 246, 0.35);
        box-shadow: 0 0 20px rgba(139, 92, 246, 0.1);
    }

    .flow-step:nth-child(3) .step-num {
        color: var(--primary);
    }

    .flow-step:nth-child(4) .step-num {
        color: var(--accent);
        border-color: rgba(255, 45, 120, 0.3);
        box-shadow: 0 0 20px rgba(255, 45, 120, 0.1);
    }

    .flow-step h3 {
        font-size: 16px;
        margin-bottom: 8px;
    }

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

    /* ========== FAQ 手风琴 ========== */
    .faq-section {
        background: var(--bg-card);
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }

    .faq-list {
        max-width: 820px;
        margin: 0 auto;
    }

    .faq-item {
        border-bottom: 1px solid var(--border);
        transition: border-color 0.3s ease;
    }

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

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

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 18px 0;
        cursor: pointer;
        user-select: none;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-main);
        transition: color 0.25s ease;
    }

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

    .faq-question .faq-icon {
        flex-shrink: 0;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        border: 1px solid var(--border);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        font-weight: 400;
        color: var(--text-sub);
        transition: all 0.3s ease;
    }

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

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
        padding: 0;
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.8;
    }

    .faq-item.open .faq-answer {
        max-height: 500px;
        padding: 0 0 18px;
    }

    /* ========== 安全数据 ========== */
    .stats-section {
        position: relative;
        background-image: url('/assets/images/backpic/back-3.webp');
        background-size: cover;
        background-position: center;
        padding: 60px 0;
    }

    .stats-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(11, 15, 26, 0.88);
    }

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

    .stat-item {
        text-align: center;
        padding: 20px;
    }

    .stat-item .stat-num {
        font-size: 34px;
        font-weight: 700;
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 4px;
        display: block;
    }

    .stat-item .stat-label {
        font-size: 13px;
        color: var(--text-sub);
    }

    /* ========== CTA ========== */
    .cta-section {
        position: relative;
        padding: 80px 0;
        background: rgba(0, 229, 160, 0.04);
        border-top: 1px solid var(--border-neon);
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -50%;
        left: 20%;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(0, 229, 160, 0.12), transparent 70%);
        pointer-events: none;
    }

    .cta-section::after {
        content: '';
        position: absolute;
        bottom: -50%;
        right: 15%;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(139, 92, 246, 0.1), transparent 70%);
        pointer-events: none;
    }

    .cta-inner {
        position: relative;
        z-index: 1;
        text-align: center;
        max-width: 700px;
        margin: 0 auto;
        padding: 0 24px;
    }

    .cta-inner h2 {
        font-size: 32px;
        margin-bottom: 12px;
    }

    .cta-inner p {
        font-size: 15px;
        color: var(--text-sub);
        margin-bottom: 30px;
        line-height: 1.8;
    }

    .cta-inner .btn-primary {
        font-size: 16px;
        padding: 14px 36px;
    }

    /* ========== 页脚 ========== */
    .site-footer {
        background: #070B14;
        border-top: 1px solid var(--border-neon);
        padding-top: 60px;
    }

    .footer-inner {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
    }

    .footer-brand-name {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-main);
        display: flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 14px;
    }

    .footer-brand-name i {
        color: var(--primary);
    }

    .footer-brand-desc {
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.8;
        max-width: 360px;
    }

    .footer-title {
        font-size: 15px;
        color: var(--text-main);
        margin-bottom: 14px;
        position: relative;
        padding-bottom: 8px;
    }

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

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

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

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

    .footer-statement {
        font-size: 13px;
        color: var(--text-weak);
        line-height: 1.7;
    }

    .footer-bottom {
        border-top: 1px solid var(--border);
        padding: 20px 24px;
        text-align: center;
    }

    .footer-bottom p {
        font-size: 13px;
        color: var(--text-weak);
    }

    /* ========== 移动端响应式 ========== */
    @media (max-width: 1024px) {
        .security-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .flow-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 32px 20px;
        }

        .flow-grid::before {
            display: none;
        }

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

    @media (max-width: 768px) {
        :root {
            --space-section: 56px;
        }

        .main-nav {
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            flex-direction: column;
            align-items: flex-start;
            background: var(--bg-dark);
            padding: 16px 24px;
            gap: 4px;
            border-bottom: 1px solid var(--border-neon);
            transform: translateY(-120%);
            transition: transform 0.3s ease;
            opacity: 0;
        }

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

        .main-nav .nav-link {
            width: 100%;
            padding: 12px 16px;
        }

        .main-nav .nav-cta {
            margin-top: 8px;
            width: 100%;
            justify-content: center;
        }

        .menu-toggle {
            display: flex;
        }

        .category-hero {
            padding: 120px 0 60px;
        }

        .category-hero h1 {
            font-size: 30px;
        }

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

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

        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

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

    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }

        .hero-actions {
            flex-direction: column;
            width: 100%;
        }

        .hero-actions .btn-primary,
        .hero-actions .btn-secondary {
            width: 100%;
            justify-content: center;
        }

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

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

        .flow-step {
            display: flex;
            text-align: left;
            gap: 16px;
            padding: 0;
        }

        .flow-step .step-num {
            margin: 0;
            flex-shrink: 0;
        }

        .cta-inner h2 {
            font-size: 24px;
        }

        .menu-toggle {
            display: flex;
        }
    }

    /* focus 可访问性 */
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
        border-radius: 4px;
    }

/* roulang page: article */
:root {
    --bg-primary: #0B0F1A;
    --bg-secondary: #111827;
    --bg-tertiary: #1A2332;
    --accent: #00E5A0;
    --accent-hover: #00FFB2;
    --accent-glow: rgba(0, 229, 160, 0.35);
    --purple: #8B5CF6;
    --magenta: #FF2D78;
    --text-main: #E6EDF3;
    --text-secondary: #8B9BB4;
    --text-muted: #5B6B84;
    --border-light: rgba(255, 255, 255, 0.08);
    --border-neon: rgba(0, 229, 160, 0.25);
    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-full: 999px;
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
    --shadow-neon: 0 0 20px rgba(0, 229, 160, 0.08);
    --content-width: 1200px;
    --nav-height: 60px;
    --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
}
button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
    background: none;
}
ul, ol {
    list-style: none;
}
.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    line-height: 1;
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, #00E5A0, #00C98A);
    color: #0B0F1A;
    box-shadow: 0 4px 18px rgba(0, 229, 160, 0.25);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover), #00D492);
    box-shadow: 0 0 16px rgba(0, 229, 160, 0.45);
    transform: translateY(-2px);
}
.btn-primary:active {
    transform: translateY(0);
}
.btn-primary:focus-visible,
.nav-link:focus-visible,
.hamburger:focus-visible,
.faq-question:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}
.btn-ghost {
    background: transparent;
    border: 1px solid var(--border-neon);
    color: var(--accent);
}
.btn-ghost:hover {
    background: rgba(0, 229, 160, 0.1);
    box-shadow: 0 0 12px rgba(0, 229, 160, 0.2);
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--nav-height);
    background: rgba(11, 15, 26, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-neon);
}
.site-header::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.35), rgba(139, 92, 246, 0.5), transparent);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 28px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-main);
    flex-shrink: 0;
}
.logo i {
    font-size: 20px;
    color: var(--accent);
    filter: drop-shadow(0 0 8px rgba(0, 229, 160, 0.5));
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}
.nav-link {
    position: relative;
    display: inline-block;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: color 0.2s ease;
}
.nav-link::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    border-radius: 2px;
    opacity: 0;
    transform: scaleX(0.4);
    transition: opacity 0.25s ease, transform 0.25s ease;
}
.nav-link:hover {
    color: var(--accent);
}
.nav-link:hover::after {
    opacity: 1;
    transform: scaleX(1);
}
.nav-link.active {
    color: var(--accent);
    text-shadow: 0 0 12px rgba(0, 229, 160, 0.3);
}
.nav-link.active::after {
    opacity: 1;
    transform: scaleX(1);
    box-shadow: 0 0 8px rgba(0, 229, 160, 0.4);
}
.header-right {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}
.nav-cta {
    padding: 9px 22px;
    font-size: 14px;
}
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: transparent;
    cursor: pointer;
    transition: background 0.2s;
}
.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}
.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding: 22px 0 0;
    font-size: 13px;
    color: var(--text-muted);
}
.breadcrumb a {
    color: var(--text-secondary);
    transition: color 0.2s;
}
.breadcrumb a:hover {
    color: var(--accent);
}
.breadcrumb i {
    font-size: 10px;
    color: var(--text-muted);
}
.breadcrumb .current {
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 280px;
}

/* 文章主体 */
.article-main {
    position: relative;
    padding: 20px 0 60px;
    background:
        linear-gradient(180deg, rgba(11, 15, 26, 0.65), rgba(11, 15, 26, 0.95)),
        url('/assets/images/backpic/back-1.webp') center top / cover no-repeat;
}
.article-header {
    text-align: center;
    padding: 36px 0 10px;
}
.article-category {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(0, 229, 160, 0.1);
    border: 1px solid rgba(0, 229, 160, 0.2);
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
}
.article-title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-main);
    letter-spacing: 0.5px;
    max-width: 800px;
    margin: 0 auto 18px;
    text-shadow: 0 0 30px rgba(0, 229, 160, 0.25);
}
.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 28px;
    flex-wrap: wrap;
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-meta i {
    color: var(--accent);
    font-size: 14px;
    opacity: 0.7;
}
.view-placeholder {
    display: inline-block;
    width: 42px;
    height: 11px;
    background: rgba(255, 255, 255, 0.14);
    border-radius: 4px;
    vertical-align: middle;
    animation: pulse 1.4s infinite ease-in-out;
}
@keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 0.35; }
}
.article-cover {
    width: 100%;
    max-width: 860px;
    height: auto;
    border-radius: var(--radius-lg);
    margin: 30px auto 0;
    object-fit: cover;
    box-shadow: var(--shadow-card), 0 0 40px rgba(0, 229, 160, 0.05);
    border: 1px solid var(--border-light);
}

/* 正文 */
.article-body {
    max-width: 760px;
    margin: 0 auto;
    padding: 40px 0 20px;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-secondary);
    word-break: break-word;
}
.article-body p {
    margin-bottom: 24px;
    color: var(--text-secondary);
}
.article-body h2 {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-main);
    margin: 48px 0 20px;
}
.article-body h3 {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-main);
    margin: 32px 0 16px;
}
.article-body h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin: 24px 0 12px;
}
.article-body img {
    width: 100%;
    border-radius: 12px;
    margin: 24px 0;
    box-shadow: var(--shadow-card);
}
.article-body blockquote {
    border-left: 4px solid var(--accent);
    background: rgba(0, 229, 160, 0.06);
    padding: 16px 20px;
    margin: 24px 0;
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
    font-size: 15px;
}
.article-body ul,
.article-body ol {
    margin: 0 0 24px;
    padding-left: 22px;
}
.article-body ul {
    list-style: disc;
}
.article-body ol {
    list-style: decimal;
}
.article-body li {
    margin-bottom: 8px;
    line-height: 1.75;
}
.article-body a {
    color: var(--accent);
    border-bottom: 1px solid rgba(0, 229, 160, 0.4);
    transition: color 0.2s, border-color 0.2s;
}
.article-body a:hover {
    color: var(--accent-hover);
    border-color: var(--accent);
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
}
.article-body th,
.article-body td {
    padding: 12px 14px;
    border: 1px solid var(--border-light);
    text-align: left;
}
.article-body th {
    background: var(--bg-tertiary);
    color: var(--text-main);
    font-weight: 600;
}
.article-body td {
    color: var(--text-secondary);
}

/* 上一篇下一篇 */
.article-pagination {
    max-width: 760px;
    margin: 40px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.article-pagination a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    transition: color 0.2s, border-color 0.2s, box-shadow 0.2s;
    max-width: calc(50% - 10px);
}
.article-pagination a i {
    font-size: 12px;
    color: var(--accent);
}
.article-pagination a:hover {
    color: var(--accent);
    border-color: var(--border-neon);
    box-shadow: 0 0 12px rgba(0, 229, 160, 0.12);
}
.page-next {
    margin-left: auto;
}

/* 空态 */
.article-empty {
    padding: 100px 0 80px;
    text-align: center;
    background:
        linear-gradient(180deg, rgba(11, 15, 26, 0.8), rgba(11, 15, 26, 0.95)),
        url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.empty-box {
    max-width: 520px;
    margin: 0 auto;
    padding: 50px 40px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-card);
}
.empty-box i {
    font-size: 46px;
    color: var(--accent);
    margin-bottom: 20px;
    display: inline-block;
}
.empty-box h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 12px;
}
.empty-box p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 26px;
}

/* 指南板块 */
.guide-section {
    padding: 70px 0;
    background: var(--bg-primary);
}
.section-head {
    text-align: center;
    margin-bottom: 48px;
}
.section-head h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.section-head p {
    font-size: 15px;
    color: var(--text-muted);
}
.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.guide-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}
.guide-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    opacity: 0;
    transition: opacity 0.3s;
}
.guide-card:hover {
    transform: translateY(-6px);
    background: var(--bg-tertiary);
    box-shadow: var(--shadow-card), var(--shadow-neon);
    border-color: var(--border-neon);
}
.guide-card:hover::before {
    opacity: 1;
}
.guide-step {
    font-size: 44px;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1px var(--accent);
    margin-bottom: 16px;
    line-height: 1;
}
.guide-card:nth-child(2) .guide-step {
    -webkit-text-stroke: 1px var(--purple);
}
.guide-card:nth-child(3) .guide-step {
    -webkit-text-stroke: 1px var(--magenta);
}
.guide-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 10px;
}
.guide-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* 相关推荐 */
.related-section {
    padding: 70px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    max-width: 860px;
    margin: 0 auto;
}
.related-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card), var(--shadow-neon);
    border-color: var(--border-neon);
}
.related-cover {
    position: relative;
    height: 190px;
    overflow: hidden;
}
.related-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.related-card:hover .related-cover img {
    transform: scale(1.06);
}
.related-cover::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(11, 15, 26, 0.65));
}
.related-cat {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    padding: 4px 12px;
    background: rgba(11, 15, 26, 0.75);
    backdrop-filter: blur(6px);
    color: var(--accent);
    font-size: 12px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(0, 229, 160, 0.3);
    font-weight: 600;
}
.related-info {
    padding: 22px 24px 24px;
}
.related-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.5;
    margin-bottom: 10px;
}
.related-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}
.related-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    transition: gap 0.2s ease;
}
.related-link i {
    font-size: 12px;
    transition: transform 0.2s ease;
}
.related-link:hover {
    gap: 10px;
}

/* FAQ */
.faq-section {
    padding: 70px 0;
    background: var(--bg-primary);
}
.faq-list {
    max-width: 780px;
    margin: 0 auto;
}
.faq-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item:hover {
    border-color: rgba(0, 229, 160, 0.15);
}
.faq-item.active {
    border-color: var(--border-neon);
    box-shadow: var(--shadow-neon);
}
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: transparent;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    text-align: left;
    transition: color 0.2s;
    min-height: 48px;
}
.faq-question:hover {
    color: var(--accent);
}
.faq-plus {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0, 229, 160, 0.1);
    border: 1px solid rgba(0, 229, 160, 0.3);
    font-size: 14px;
    color: var(--accent);
    transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item.active .faq-plus {
    transform: rotate(45deg);
    background: var(--accent);
    color: #0B0F1A;
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.faq-answer-inner {
    padding: 0 20px 18px 58px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* CTA */
.cta-section {
    padding: 0;
    background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
    position: relative;
}
.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(11, 15, 26, 0.9), rgba(11, 15, 26, 0.7), rgba(139, 92, 246, 0.15));
}
.cta-inner {
    position: relative;
    z-index: 2;
    padding: 90px 0;
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
}
.cta-title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-main);
    margin-bottom: 16px;
    text-shadow: 0 0 30px rgba(0, 229, 160, 0.25);
}
.cta-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}
.btn-cta {
    padding: 16px 42px;
    font-size: 16px;
    background: linear-gradient(135deg, #00E5A0, #00C98A);
    color: #0B0F1A;
    border-radius: 10px;
    box-shadow: 0 0 30px rgba(0, 229, 160, 0.3), 0 6px 24px rgba(0, 229, 160, 0.2);
    transition: all 0.3s ease;
}
.btn-cta:hover {
    box-shadow: 0 0 40px rgba(0, 229, 160, 0.5), 0 8px 32px rgba(0, 229, 160, 0.3);
    transform: translateY(-3px);
}
.btn-cta:active {
    transform: translateY(0);
}

/* Footer */
.site-footer {
    background: #080C14;
    border-top: 1px solid var(--border-neon);
    padding: 55px 0 0;
}
.footer-inner {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.6fr 0.8fr 1fr;
    gap: 48px;
}
.footer-brand-name {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 14px;
}
.footer-brand-name i {
    color: var(--accent);
    font-size: 20px;
}
.footer-brand-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 360px;
}
.footer-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 18px;
    letter-spacing: 0.5px;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s;
}
.footer-links a:hover {
    color: var(--accent);
}
.footer-statement {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
}
.footer-bottom {
    margin-top: 46px;
    padding: 20px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* 响应式 */
@media (max-width: 1024px) {
    .guide-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
    }
    .article-title {
        font-size: 32px;
    }
    .cta-title {
        font-size: 30px;
    }
}
@media (max-width: 968px) {
    .hamburger {
        display: flex;
    }
    .nav-cta {
        display: none;
    }
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(11, 15, 26, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 10px;
        z-index: 99;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.35s ease;
        margin-left: 0;
    }
    .main-nav.open {
        opacity: 1;
        pointer-events: auto;
    }
    .nav-link {
        font-size: 22px;
        padding: 14px 30px;
        opacity: 0;
        transform: translateY(14px);
        transition: opacity 0.3s ease, transform 0.3s ease, color 0.2s;
    }
    .main-nav.open .nav-link {
        opacity: 1;
        transform: translateY(0);
    }
    .nav-link::after {
        left: 30px;
        right: 30px;
        bottom: 8px;
    }
    .header-inner {
        position: relative;
        z-index: 101;
    }
    .hamburger {
        position: relative;
        z-index: 102;
    }
}
@media (max-width: 767px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    .article-title {
        font-size: 26px;
    }
    .article-meta {
        gap: 16px;
    }
    .article-pagination {
        flex-direction: column;
    }
    .article-pagination a {
        max-width: 100%;
    }
    .guide-grid {
        grid-template-columns: 1fr;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .cta-inner {
        padding: 60px 16px;
    }
    .cta-title {
        font-size: 26px;
    }
    .guide-card {
        padding: 28px 20px;
    }
    .faq-answer-inner {
        padding-left: 20px;
    }
    .section-head h2 {
        font-size: 26px;
    }
}
@media (max-width: 520px) {
    .logo {
        font-size: 15px;
    }
    .logo i {
        font-size: 18px;
    }
    .article-category {
        font-size: 11px;
    }
    .breadcrumb .current {
        max-width: 160px;
    }
    .article-body h2 {
        font-size: 22px;
    }
    .article-body h3 {
        font-size: 18px;
    }
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

/* roulang page: category2 */
:root {
            --bg-primary: #0B0F1A;
            --bg-secondary: #111827;
            --bg-hover: #1A2332;
            --accent: #00E5A0;
            --accent-dark: #00C98A;
            --accent-purple: #8B5CF6;
            --hot-pink: #FF2D78;
            --text-primary: #E6EDF3;
            --text-secondary: #8B9BB4;
            --text-muted: #5B6B84;
            --border: rgba(255, 255, 255, 0.08);
            --border-neon: rgba(0, 229, 160, 0.25);
            --radius: 12px;
            --radius-btn: 8px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
            --glow: 0 0 20px rgba(0, 229, 160, 0.08);
            --container: 1200px;
            --transition: 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #fff;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            color: inherit;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            transition: all var(--transition);
            outline: none;
            white-space: nowrap;
        }
        .btn:focus-visible {
            box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.4);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #0B0F1A;
            box-shadow: 0 4px 20px rgba(0, 229, 160, 0.2);
        }
        .btn-primary:hover {
            box-shadow: 0 0 18px rgba(0, 229, 160, 0.5);
            background: linear-gradient(135deg, #1af0b0, #00d795);
            color: #0B0F1A;
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 8px rgba(0, 229, 160, 0.4);
        }
        .btn-ghost {
            background: transparent;
            border: 1px solid var(--border-neon);
            color: var(--accent);
        }
        .btn-ghost:hover {
            background: rgba(0, 229, 160, 0.1);
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.15);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-ghost:active {
            transform: translateY(1px);
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 15, 26, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: 60px;
        }
        .site-header::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), var(--accent-purple), transparent);
            opacity: 0.6;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 60px;
            gap: 24px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 22px;
        }
        .logo:hover {
            color: var(--accent);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-block;
            padding: 20px 16px 17px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 3px solid transparent;
            transition: all var(--transition);
            line-height: 1;
        }
        .nav-link:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
            text-shadow: 0 0 12px rgba(0, 229, 160, 0.3);
        }
        .nav-link.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
            text-shadow: 0 0 12px rgba(0, 229, 160, 0.4);
        }
        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
            flex-shrink: 0;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: var(--bg-secondary);
        }
        .hamburger span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 100px 0 90px;
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 15, 26, 0.94), rgba(11, 15, 26, 0.75), rgba(11, 15, 26, 0.4));
        }
        .page-hero::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0.7;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid var(--border-neon);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }
        .page-hero h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 18px;
            text-shadow: 0 0 30px rgba(0, 229, 160, 0.3);
        }
        .page-hero p {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* Section header */
        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 52px;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 999px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid var(--border-neon);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-subtitle {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.75;
        }

        /* Features */
        .features-section {
            background: var(--bg-primary);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: all var(--transition);
            position: relative;
        }
        .feature-card:hover {
            background: var(--bg-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }
        .feature-card.feature-highlight {
            background: linear-gradient(160deg, rgba(139, 92, 246, 0.12), rgba(17, 24, 39, 0.9));
            border-color: rgba(139, 92, 246, 0.4);
            transform: translateY(-12px);
        }
        .feature-card.feature-highlight:hover {
            transform: translateY(-16px);
            box-shadow: 0 12px 36px rgba(139, 92, 246, 0.2);
        }
        .feature-card .highlight-badge {
            position: absolute;
            top: -10px;
            right: 16px;
            background: var(--hot-pink);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 4px;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            background: rgba(0, 229, 160, 0.12);
            color: var(--accent);
            border: 1px solid var(--border-neon);
        }
        .feature-card.feature-highlight .feature-icon {
            background: rgba(139, 92, 246, 0.16);
            color: var(--accent-purple);
            border-color: rgba(139, 92, 246, 0.35);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Scenarios */
        .scenarios-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .scenario-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scenario-card {
            background: var(--bg-primary);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .scenario-card:nth-child(2) {
            border-color: rgba(139, 92, 246, 0.35);
            transform: scale(1.02);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow);
            border-color: var(--border-neon);
            transform: translateY(-6px);
        }
        .scenario-card:nth-child(2):hover {
            transform: translateY(-6px) scale(1.02);
        }
        .scenario-media {
            height: 190px;
            overflow: hidden;
            position: relative;
        }
        .scenario-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .scenario-card:hover .scenario-media img {
            transform: scale(1.05);
        }
        .scenario-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, var(--bg-primary) 0%, transparent 45%);
        }
        .scenario-body {
            padding: 24px;
        }
        .scenario-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .scenario-body h3 i {
            color: var(--accent);
            font-size: 16px;
        }
        .scenario-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .scenario-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .scenario-link:hover {
            color: #fff;
            gap: 10px;
        }

        /* Process steps */
        .process-section {
            background: var(--bg-primary);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }
        .process-steps::before {
            content: "";
            position: absolute;
            top: 30px;
            left: 6%;
            right: 6%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), var(--accent-purple), var(--accent));
            opacity: 0.25;
        }
        .process-step {
            text-align: center;
            padding: 0 20px;
            position: relative;
            z-index: 1;
        }
        .step-number {
            width: 60px;
            height: 60px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: var(--bg-secondary);
            border: 2px solid var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            box-shadow: 0 0 18px rgba(0, 229, 160, 0.15);
        }
        .process-step:nth-child(2) .step-number {
            border-color: var(--accent-purple);
            color: var(--accent-purple);
            box-shadow: 0 0 18px rgba(139, 92, 246, 0.2);
        }
        .process-step:nth-child(3) .step-number {
            border-color: var(--hot-pink);
            color: var(--hot-pink);
            box-shadow: 0 0 18px rgba(255, 45, 120, 0.2);
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Checklist */
        .checklist-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .checklist-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .checklist-item {
            background: var(--bg-primary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 28px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            transition: all var(--transition);
        }
        .checklist-item:hover {
            border-color: var(--border-neon);
            background: var(--bg-hover);
            transform: translateX(4px);
        }
        .checklist-item i {
            font-size: 22px;
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .checklist-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 5px;
        }
        .checklist-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-primary);
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item.active {
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: all var(--transition);
        }
        .faq-item.active .faq-icon {
            border-color: var(--accent);
            color: var(--accent);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* CTA */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background-image: url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 15, 26, 0.92), rgba(11, 15, 26, 0.82));
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-inner h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
            text-shadow: 0 0 30px rgba(0, 229, 160, 0.25);
        }
        .cta-inner p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .cta-inner .btn {
            font-size: 16px;
            padding: 16px 40px;
        }

        /* Footer */
        .site-footer {
            background: #070A12;
            border-top: 1px solid var(--border);
            position: relative;
            padding: 60px 0 0;
        }
        .site-footer::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), var(--accent-purple), transparent);
            opacity: 0.5;
        }
        .footer-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px 40px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
        }
        .footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand-name i {
            color: var(--accent);
        }
        .footer-brand-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 420px;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .footer-links a {
            display: block;
            color: var(--text-muted);
            font-size: 14px;
            padding: 6px 0;
            transition: all var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-statement {
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.8;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 24px;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .feature-card.feature-highlight {
                transform: translateY(0);
            }
            .feature-card.feature-highlight:hover {
                transform: translateY(-6px);
            }
            .scenario-list {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 20px;
            }
            .process-steps::before {
                display: none;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .page-hero h1 {
                font-size: 38px;
            }
        }
        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 56px 0;
            }
            .site-header {
                height: 60px;
            }
            .header-inner {
                height: 60px;
                gap: 12px;
            }
            .logo {
                font-size: 17px;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 26, 0.98);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px 28px;
                gap: 4px;
                transform: translateY(-150%);
                transition: transform 0.35s ease;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .nav-link {
                width: 100%;
                padding: 14px 12px;
                font-size: 16px;
                border-bottom: 1px solid var(--border);
            }
            .nav-link.active {
                border-bottom-color: var(--accent);
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: flex;
                flex-shrink: 0;
            }
            .page-hero {
                padding: 64px 0 56px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-title {
                font-size: 26px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenario-list {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .checklist-grid {
                grid-template-columns: 1fr;
            }
            .checklist-item {
                padding: 20px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-section {
                padding: 64px 0;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
        }
        @media (max-width: 520px) {
            .feature-card {
                padding: 24px 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 18px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
        }

/* roulang page: category3 */
:root {
  --bg: #0B0F1A;
  --bg-deep: #070B13;
  --card: #111827;
  --card-hover: #1A2332;
  --neon: #00E5A0;
  --neon-dark: #00C98A;
  --purple: #8B5CF6;
  --pink: #FF2D78;
  --text: #E6EDF3;
  --muted: #8B9BB4;
  --dim: #5B6B84;
  --border: rgba(255, 255, 255, 0.08);
  --neon-border: rgba(0, 229, 160, 0.25);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --neon-shadow: 0 0 20px rgba(0, 229, 160, 0.08);
  --font: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--neon);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover {
  color: #fff;
}

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

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

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

/* ===== Header & Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 26, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, transparent, var(--neon), var(--purple), transparent) 1;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.logo i {
  color: var(--neon);
  font-size: 20px;
  filter: drop-shadow(0 0 8px rgba(0, 229, 160, 0.4));
}

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

.main-nav .nav-link {
  position: relative;
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  padding: 18px 2px;
  transition: color 0.25s ease;
}

.main-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--purple));
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.4);
  transition: all 0.3s ease;
}

.main-nav .nav-link:hover {
  color: var(--neon);
}

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

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

.main-nav .nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
  box-shadow: 0 0 12px rgba(0, 229, 160, 0.5);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--neon), var(--neon-dark));
  color: var(--bg);
  font-size: 14px;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  border: none;
  transition: all 0.25s ease;
  white-space: nowrap;
  box-shadow: 0 4px 18px rgba(0, 229, 160, 0.2);
}

.nav-cta:hover {
  background: linear-gradient(135deg, #34f5b8, var(--neon-dark));
  color: var(--bg);
  box-shadow: 0 0 16px rgba(0, 229, 160, 0.45);
  transform: translateY(-1px);
}

.nav-cta:active {
  transform: translateY(1px);
}

.nav-cta:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border);
  gap: 5px;
  transition: all 0.25s ease;
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger:hover {
  border-color: var(--neon-border);
}

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

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

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

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  top: 60px;
  z-index: 99;
  background: var(--bg);
  padding: 32px 24px;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

.mobile-menu a {
  display: block;
  padding: 16px 8px;
  font-size: 20px;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  transition: all 0.25s ease;
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--neon);
  padding-left: 14px;
}

.mobile-menu .mobile-cta {
  margin-top: 24px;
  text-align: center;
}

/* ===== Page Hero Banner ===== */
.page-banner {
  position: relative;
  padding: 88px 0 96px;
  background-image: url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 15, 26, 0.94), rgba(11, 15, 26, 0.78), rgba(11, 15, 26, 0.55));
}

.page-banner::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--purple), transparent);
}

.banner-inner {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--dim);
  margin-bottom: 20px;
}

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

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

.breadcrumb .sep {
  color: var(--dim);
}

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

.page-banner h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  text-shadow: 0 0 30px rgba(0, 229, 160, 0.35);
  margin-bottom: 16px;
}

.page-banner .banner-sub {
  max-width: 640px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 32px;
}

.banner-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--neon), var(--neon-dark));
  color: var(--bg) !important;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  border: none;
  transition: all 0.25s ease;
  box-shadow: 0 4px 20px rgba(0, 229, 160, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #34f5b8, var(--neon-dark));
  box-shadow: 0 0 16px rgba(0, 229, 160, 0.45);
  transform: translateY(-2px);
  color: var(--bg) !important;
}

.btn-primary:active {
  transform: translateY(1px);
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--neon);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 30px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--neon-border);
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background: rgba(0, 229, 160, 0.1);
  color: var(--neon);
  border-color: var(--neon);
  box-shadow: 0 0 12px rgba(0, 229, 160, 0.15);
}

.btn-secondary:active {
  transform: translateY(1px);
}

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

/* ===== Section base ===== */
.section {
  padding: 84px 0;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--neon);
  background: rgba(0, 229, 160, 0.1);
  border: 1px solid var(--neon-border);
  padding: 4px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
  margin-bottom: 14px;
}

.section-head p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

/* ===== Feature cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 30px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--purple), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  background: var(--card-hover);
  border-color: var(--neon-border);
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), var(--neon-shadow);
}

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

.feature-card.featured {
  background: linear-gradient(180deg, #151E2F, var(--card));
  border-color: var(--neon-border);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45), 0 0 20px rgba(0, 229, 160, 0.08);
  transform: translateY(-10px);
}

.feature-card.featured:hover {
  transform: translateY(-14px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(0, 229, 160, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--neon);
  margin-bottom: 22px;
  border: 1px solid var(--neon-border);
}

.feature-card.featured .feature-icon {
  background: linear-gradient(135deg, var(--neon), var(--purple));
  color: var(--bg);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.feature-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 18px;
}

.feature-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--pink);
  background: rgba(255, 45, 120, 0.1);
  border: 1px solid rgba(255, 45, 120, 0.25);
  padding: 2px 12px;
  border-radius: 4px;
  position: absolute;
  top: 18px;
  right: 18px;
}

/* ===== Gift Content Section ===== */
.gift-content-section {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.gift-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.gift-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
}

.gift-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gift-media:hover img {
  transform: scale(1.03);
}

.gift-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11, 15, 26, 0.4));
}

.gift-info h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 18px;
}

.gift-info .lead-text {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 28px;
}

.gift-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.gift-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  transition: all 0.3s ease;
}

.gift-item:hover {
  border-color: var(--neon-border);
  background: var(--card-hover);
}

.gift-item i {
  color: var(--neon);
  font-size: 16px;
  margin-top: 3px;
}

.gift-item strong {
  display: block;
  font-size: 15px;
  color: var(--text);
  margin-bottom: 3px;
}

.gift-item span {
  font-size: 13px;
  color: var(--dim);
  line-height: 1.5;
}

/* ===== Flow Process ===== */
.flow-section {
  padding: 84px 0;
}

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

.flow-steps::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 60px;
  right: 60px;
  height: 1px;
  background: linear-gradient(90deg, var(--neon), var(--purple), var(--neon));
  opacity: 0.3;
}

.flow-step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.flow-step:hover {
  transform: translateY(-6px);
  border-color: var(--neon-border);
  background: var(--card-hover);
  box-shadow: var(--shadow), var(--neon-shadow);
}

.step-number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon), var(--purple));
  color: var(--bg);
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  box-shadow: 0 0 20px rgba(0, 229, 160, 0.3);
  position: relative;
  z-index: 2;
}

.flow-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.flow-step p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* ===== Scenes ===== */
.scenes-section {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.scene-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s ease;
}

.scene-card:hover {
  transform: translateY(-6px);
  border-color: var(--neon-border);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4), var(--neon-shadow);
}

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

.scene-card-body {
  padding: 26px 26px 30px;
}

.scene-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.scene-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}

.scene-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--neon);
  background: rgba(0, 229, 160, 0.1);
  border: 1px solid var(--neon-border);
  border-radius: 4px;
  padding: 3px 10px;
  margin-bottom: 14px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 84px 0;
}

.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.faq-item.active {
  border-color: var(--neon-border);
  box-shadow: 0 0 16px rgba(0, 229, 160, 0.06);
}

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

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

.faq-question:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
  border-radius: 10px;
}

.faq-icon {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--neon);
  transition: all 0.35s ease;
  margin-left: 16px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  border-color: var(--neon);
  background: rgba(0, 229, 160, 0.08);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 22px 20px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.85;
  border-top: 1px solid var(--border);
  margin: 0 22px;
  padding: 16px 0 20px;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 90px 0;
  background-image: url("/assets/images/backpic/back-3.webp");
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11, 15, 26, 0.95), rgba(11, 15, 26, 0.82), rgba(11, 15, 26, 0.7));
}

.cta-section::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--purple), transparent);
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

.cta-inner .section-tag {
  color: var(--pink);
  border-color: rgba(255, 45, 120, 0.3);
  background: rgba(255, 45, 120, 0.08);
}

.cta-inner h2 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 16px;
}

.cta-inner p {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 32px;
  line-height: 1.8;
}

.cta-inner .btn-primary {
  font-size: 16px;
  padding: 14px 40px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  position: relative;
}

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

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand-name i {
  color: var(--neon);
  font-size: 20px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 380px;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--purple));
  border-radius: 2px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--muted);
  padding: 6px 0;
  transition: all 0.25s ease;
}

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

.footer-statement {
  font-size: 13px;
  color: var(--dim);
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 20px 24px;
  font-size: 13px;
  color: var(--dim);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid,
  .scenes-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .feature-card.featured {
    transform: translateY(0);
  }

  .feature-card.featured:hover {
    transform: translateY(-6px);
  }

  .flow-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .flow-steps::before {
    display: none;
  }

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

  .gift-media img {
    height: 320px;
  }

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

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu.open {
    display: flex;
  }

  .header-inner {
    gap: 12px;
  }

  .logo {
    font-size: 15px;
  }

  .logo i {
    font-size: 17px;
  }

  .page-banner {
    padding: 64px 0 72px;
  }

  .page-banner h1 {
    font-size: 32px;
  }

  .page-banner .banner-sub {
    font-size: 15px;
  }

  .section {
    padding: 60px 0;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .feature-card {
    padding: 28px 22px;
  }

  .gift-list {
    grid-template-columns: 1fr;
  }

  .cta-section {
    padding: 64px 0;
  }

  .cta-inner h2 {
    font-size: 28px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 44px 24px 32px;
  }

  .container {
    padding: 0 16px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .banner-inner {
    padding: 0 16px;
  }

  .footer-bottom {
    padding: 16px;
    font-size: 12px;
  }
}

@media (max-width: 520px) {
  .features-grid,
  .scenes-grid,
  .flow-steps {
    grid-template-columns: 1fr;
  }

  .feature-card.featured {
    transform: translateY(0);
  }

  .feature-card.featured:hover {
    transform: translateY(-4px);
  }

  .page-banner h1 {
    font-size: 28px;
  }

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

  .banner-actions .btn-primary,
  .banner-actions .btn-secondary {
    text-align: center;
  }

  .gift-media img {
    height: 220px;
  }

  .gift-info h2 {
    font-size: 24px;
  }

  .section-head h2 {
    font-size: 23px;
  }

  .faq-question {
    font-size: 15px;
    padding: 14px 16px;
  }

  .faq-answer-inner {
    margin: 0 16px;
    padding-left: 0;
    padding-right: 0;
  }
}