/* roulang page: index */
:root{
  --primary:#0B1D33;
  --accent:#00C9A7;
  --orange:#FF8A3D;
  --bg:#F5F7FA;
  --card-bg:#FFFFFF;
  --heading:#0B1D33;
  --text:#3D4A5C;
  --muted:#7A8699;
  --border:rgba(11,29,51,0.08);
  --border-dark:rgba(255,255,255,0.12);
  --radius-card:16px;
  --radius-btn:8px;
  --radius-img:12px;
  --shadow-card:0 2px 8px rgba(11,29,51,0.06);
  --shadow-hover:0 12px 28px rgba(11,29,51,0.12);
  --shadow-accent:0 8px 24px rgba(0,201,167,0.25);
  --font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --gap-section:clamp(56px,8vw,96px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-family);font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:all .2s ease}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.row{max-width:1200px;margin:0 auto}
.section-pad{padding:var(--gap-section) 0}
.section-title{font-size:30px;line-height:1.3;font-weight:700;color:var(--heading);letter-spacing:-0.015em;margin-bottom:12px}
.section-sub{font-size:16px;color:var(--muted);margin-bottom:48px;max-width:680px}
.text-center{text-align:center}
.section-title.center,.section-sub.center{margin-left:auto;margin-right:auto;text-align:center}
.divider{height:1px;background:var(--border);position:relative;margin:0}
.divider::after{content:'';position:absolute;left:0;top:-3px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 32px;border-radius:var(--radius-btn);font-size:15px;font-weight:700;line-height:1.4;border:2px solid transparent;cursor:pointer;transition:all .2s ease;text-align:center;letter-spacing:0.01em}
.btn-primary{background:var(--accent);color:#04222A;box-shadow:0 4px 14px rgba(0,201,167,0.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,201,167,0.35);filter:brightness(1.05);color:#04222A}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(0,201,167,0.2)}
.btn-primary.hero-cta{box-shadow:0 0 0 4px rgba(0,201,167,0.15),0 8px 30px rgba(0,201,167,0.35)}
.btn-primary.hero-cta:hover{box-shadow:0 0 0 6px rgba(0,201,167,0.2),0 12px 40px rgba(0,201,167,0.4)}
.btn-outline{background:transparent;border-color:var(--accent);color:var(--accent)}
.btn-outline:hover{background:rgba(0,201,167,0.1);color:var(--accent);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,0.1);border-color:rgba(255,255,255,0.3);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,0.2);color:#fff;transform:translateY(-2px)}
.btn:focus-visible{outline:3px solid rgba(0,201,167,0.5);outline-offset:2px}
/* Badge */
.badge{display:inline-block;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;background:rgba(0,201,167,0.12);color:#008f7a;line-height:1.6;letter-spacing:0.02em}
.badge-orange{background:rgba(255,138,61,0.12);color:#d96e28}
.badge-dark{background:rgba(255,255,255,0.15);color:#fff}
/* Header */
.site-header{background:var(--primary);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,0.15);height:72px;display:flex;align-items:center}
.site-header.scrolled{background:rgba(11,29,51,0.85);backdrop-filter:blur(12px)}
.nav-container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;width:100%;height:100%;gap:20px}
.brand-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{width:36px;height:36px;border-radius:10px;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#04222A;font-size:18px;flex-shrink:0}
.brand-text{font-size:20px;font-weight:800;color:#fff;letter-spacing:-0.01em;white-space:nowrap;line-height:1.2}
.brand-text span{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}
.nav-links a{padding:8px 16px;color:rgba(255,255,255,0.75);font-size:15px;font-weight:500;border-radius:6px;position:relative;transition:color .2s ease;white-space:nowrap}
.nav-links a:hover{color:#fff}
.nav-links a.active{color:var(--accent)}
.nav-links a.active::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:20px;height:2px;background:var(--accent);border-radius:2px}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search input{height:38px;border-radius:999px;border:1px solid rgba(255,255,255,0.15);background:rgba(255,255,255,0.08);color:#fff;padding:0 16px 0 38px;font-size:14px;width:200px;outline:none;transition:all .2s ease}
.nav-search input::placeholder{color:rgba(255,255,255,0.5)}
.nav-search input:focus{border-color:var(--accent);background:rgba(255,255,255,0.12);box-shadow:0 0 0 2px rgba(0,201,167,0.2)}
.nav-search i{position:absolute;left:14px;color:rgba(255,255,255,0.5);font-size:14px;pointer-events:none}
.nav-btn-login{color:#fff;font-size:14px;font-weight:600;background:transparent;border:none;cursor:pointer;padding:8px 12px;border-radius:6px;transition:all .2s ease}
.nav-btn-login:hover{background:rgba(255,255,255,0.1)}
.nav-btn-start{padding:10px 20px;border-radius:8px;background:var(--accent);color:#04222A;font-size:14px;font-weight:700;border:none;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 10px rgba(0,201,167,0.2)}
.nav-btn-start:hover{transform:translateY(-2px);box-shadow:0 4px 18px rgba(0,201,167,0.35)}
.burger-btn{display:none;background:transparent;border:none;cursor:pointer;width:42px;height:42px;border-radius:8px;align-items:center;justify-content:center;color:#fff;font-size:20px;flex-shrink:0}
.burger-btn:hover{background:rgba(255,255,255,0.08)}
.mobile-menu{display:none;background:var(--primary);padding:16px 24px;position:fixed;top:72px;left:0;right:0;z-index:999;box-shadow:0 8px 30px rgba(0,0,0,0.2);backdrop-filter:blur(12px);background:rgba(11,29,51,0.95)}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:14px 8px;color:rgba(255,255,255,0.8);font-size:16px;font-weight:500;border-bottom:1px solid rgba(255,255,255,0.08)}
.mobile-menu a:hover{color:var(--accent);padding-left:16px}
.mobile-menu a.active{color:var(--accent);font-weight:700}
.mobile-menu a:last-child{border-bottom:none}
/* Hero */
.hero{background:var(--primary);position:relative;overflow:hidden;padding:80px 0 0;color:#fff}
.hero-bg{position:absolute;top:0;left:0;right:0;bottom:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;z-index:0}
.hero-bg::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(180deg,rgba(11,29,51,0.75) 0%,rgba(11,29,51,0.88) 60%,rgba(11,29,51,0.96) 100%);z-index:1}
.hero-grid-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);background-size:60px 60px;z-index:1;pointer-events:none}
.hero-content{position:relative;z-index:2;padding-bottom:60px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(0,201,167,0.15);border:1px solid rgba(0,201,167,0.3);color:var(--accent);padding:6px 18px;border-radius:999px;font-size:14px;font-weight:600;margin-bottom:24px}
.hero-badge::before{content:'●';font-size:8px}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;color:#fff;letter-spacing:-0.02em;margin-bottom:20px;max-width:760px}
.hero h1 span{color:var(--accent);position:relative}
.hero-sub{font-size:18px;line-height:1.8;color:rgba(255,255,255,0.75);margin-bottom:36px;max-width:560px}
.hero-cta-group{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:60px}
.hero-login-card{position:absolute;right:0;top:100px;width:280px;background:rgba(255,255,255,0.08);backdrop-filter:blur(16px);border-radius:var(--radius-card);border:1px solid rgba(255,255,255,0.15);padding:28px;box-shadow:0 8px 32px rgba(0,0,0,0.2);z-index:3}
.hero-login-card h4{color:#fff;font-size:17px;font-weight:700;margin-bottom:6px}
.hero-login-card p{color:rgba(255,255,255,0.6);font-size:13px;margin-bottom:18px}
.hero-login-card .btn{width:100%;padding:11px;font-size:14px;margin-bottom:10px}
.hero-login-card .btn-outline{background:transparent;border-color:rgba(255,255,255,0.4)}
.hero-login-card .btn-outline:hover{background:rgba(255,255,255,0.1);border-color:var(--accent)}
.hero-stats{position:relative;z-index:2;border-top:1px solid rgba(255,255,255,0.1);padding:32px 0}
.hero-stats .stat-item{text-align:center;padding:10px 0}
.hero-stats .stat-num{font-size:36px;font-weight:800;color:#fff;letter-spacing:-0.01em;font-family:"DIN Alternate","Bahnschrift",sans-serif;line-height:1.2;margin-bottom:4px}
.hero-stats .stat-num em{font-style:normal;color:var(--accent)}
.hero-stats .stat-label{font-size:14px;color:rgba(255,255,255,0.55);letter-spacing:0.02em}
/* Pain Points */
.pain-points{background:var(--bg);padding:var(--gap-section) 0}
.pain-points .section-title{margin-bottom:16px}
.pain-list{margin-top:28px;display:flex;flex-direction:column;gap:20px}
.pain-item{display:flex;gap:16px;align-items:flex-start}
.pain-item .dot{width:10px;height:10px;border-radius:50%;background:var(--orange);flex-shrink:0;margin-top:9px;box-shadow:0 2px 6px rgba(255,138,61,0.4)}
.pain-item p{font-size:15px;line-height:1.7;color:var(--text)}
.pain-item p strong{display:block;color:var(--heading);font-size:16px;font-weight:700;margin-bottom:4px}
.pain-img-wrap{position:relative;border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card)}
.pain-img-wrap img{width:100%;aspect-ratio:4/3;object-fit:cover}
.pain-img-wrap::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(120deg,rgba(11,29,51,0.2),transparent 60%)}
/* Solutions */
.solutions{background:#fff;padding:var(--gap-section) 0}
.solutions .section-title{margin-bottom:16px}
.solutions .section-sub{margin-bottom:56px}
.solution-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-card);padding:36px 30px;position:relative;overflow:hidden;box-shadow:var(--shadow-card);transition:all .3s ease;height:100%}
.solution-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent);transform:scaleX(0);transition:transform .3s ease;transform-origin:left}
.solution-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-6px)}
.solution-card:hover::before{transform:scaleX(1)}
.solution-card.featured{background:rgba(0,201,167,0.06);border-color:rgba(0,201,167,0.2)}
.solution-card.featured::before{transform:scaleX(1)}
.solution-icon{width:56px;height:56px;border-radius:14px;background:rgba(0,201,167,0.12);display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:24px;margin-bottom:22px}
.solution-card h3{font-size:19px;font-weight:700;color:var(--heading);margin-bottom:12px;letter-spacing:-0.01em}
.solution-card p{font-size:15px;line-height:1.75;color:var(--text);margin-bottom:18px}
.solution-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--accent)}
.solution-link i{transition:transform .2s ease}
.solution-link:hover i{transform:translateX(4px)}
.solution-card.featured .featured-badge{position:absolute;top:0;right:0;background:var(--orange);color:#fff;font-size:12px;padding:6px 14px;border-radius:0 0 0 14px;font-weight:600;letter-spacing:0.03em}
/* Process */
.process{background:var(--bg);padding:var(--gap-section) 0;position:relative;overflow:hidden}
.process .section-title{margin-bottom:16px}
.process-steps{display:flex;flex-direction:column;gap:8px;margin-top:40px}
.process-step{display:flex;gap:20px;align-items:flex-start;padding:20px 0;position:relative}
.process-step::before{content:'';position:absolute;left:24px;top:60px;bottom:-20px;width:2px;border-left:2px dashed rgba(0,201,167,0.4)}
.process-step:last-child::before{display:none}
.process-step .step-num{width:48px;height:48px;border-radius:50%;background:var(--primary);color:var(--accent);border:2px solid var(--accent);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;flex-shrink:0;z-index:1}
.process-step .step-content{flex:1;padding-top:2px}
.process-step .step-content h4{font-size:18px;font-weight:700;color:var(--heading);margin-bottom:6px}
.process-step .step-content p{font-size:15px;color:var(--text);line-height:1.7}
.process-img-wrap{border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-hover);height:100%;min-height:320px}
.process-img-wrap img{width:100%;height:100%;object-fit:cover}
/* News */
.news-section{background:#fff;padding:var(--gap-section) 0}
.news-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);transition:all .3s ease;height:100%;display:flex;flex-direction:column}
.news-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-6px)}
.news-card-img{position:relative;overflow:hidden;aspect-ratio:16/9}
.news-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-card-img img{transform:scale(1.05)}
.news-card-body{padding:24px;display:flex;flex-direction:column;flex:1}
.news-card-body .badge{align-self:flex-start;margin-bottom:12px}
.news-card-body h3{font-size:17px;font-weight:700;line-height:1.4;color:var(--heading);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-body h3 a{color:inherit}
.news-card-body h3 a:hover{color:var(--accent)}
.news-card-body p{font-size:14px;line-height:1.7;color:var(--muted);margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}
.news-meta a{color:var(--accent);font-weight:600;font-size:13px}
.news-meta a i{transition:transform .2s}
.news-meta a:hover i{transform:translateX(4px)}
.empty-state{text-align:center;padding:60px 20px;color:var(--muted)}
.empty-state i{font-size:48px;color:var(--border);margin-bottom:16px;display:block}
.empty-state p{font-size:15px}
/* Testimonials */
.testimonials{background:var(--bg);padding:var(--gap-section) 0}
.testimonial-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-card);padding:30px;position:relative;box-shadow:var(--shadow-card);height:100%}
.testimonial-card::before{content:'“';position:absolute;top:10px;left:20px;font-size:72px;line-height:1;color:rgba(0,201,167,0.15);font-family:Georgia,serif}
.testimonial-stars{color:var(--orange);font-size:14px;margin-bottom:14px;letter-spacing:2px}
.testimonial-text{font-size:15px;line-height:1.8;color:var(--text);margin-bottom:20px;position:relative;z-index:1}
.testimonial-user{display:flex;align-items:center;gap:12px;border-top:1px solid var(--border);padding-top:16px}
.testimonial-avatar{width:42px;height:42px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex-shrink:0}
.testimonial-user-info .name{font-size:15px;font-weight:600;color:var(--heading)}
.testimonial-user-info .role{font-size:13px;color:var(--muted)}
/* FAQ */
.faq-section{background:#fff;padding:var(--gap-section) 0}
.faq-container{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-card);margin-bottom:14px;overflow:hidden;transition:box-shadow .2s ease}
.faq-item:hover{box-shadow:var(--shadow-card)}
.faq-item.open{box-shadow:var(--shadow-card)}
.faq-question{width:100%;background:transparent;border:none;text-align:left;padding:22px 28px;font-size:17px;font-weight:600;color:var(--heading);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:var(--font-family);transition:color .2s ease}
.faq-question:hover{color:var(--accent)}
.faq-icon{font-size:22px;font-weight:400;color:var(--muted);transition:transform .3s ease;flex-shrink:0}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--accent)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer-inner{padding:0 28px 24px;font-size:15px;line-height:1.8;color:var(--text)}
/* CTA */
.cta-section{background:var(--primary);position:relative;overflow:hidden;padding:calc(var(--gap-section) * 0.8) 0}
.cta-bg{position:absolute;top:0;left:0;right:0;bottom:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:0.25;z-index:0}
.cta-bg::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(11,29,51,0.9),rgba(0,201,167,0.15));z-index:1}
.cta-content{position:relative;z-index:2;text-align:center;max-width:700px;margin:0 auto}
.cta-content h2{color:#fff;font-size:34px;font-weight:800;letter-spacing:-0.02em;margin-bottom:16px}
.cta-content h2 span{color:var(--accent)}
.cta-content p{color:rgba(255,255,255,0.7);font-size:17px;line-height:1.8;margin-bottom:40px}
.cta-btns{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.cta-note{margin-top:24px;font-size:14px;color:rgba(255,255,255,0.4)}
/* Footer */
.site-footer{background:var(--primary);padding-top:64px;color:rgba(255,255,255,0.7)}
.footer-top{padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-brand .brand-logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,0.55);max-width:280px}
.footer-title{color:#fff;font-size:16px;font-weight:700;margin-bottom:20px;letter-spacing:0.01em}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,0.55);display:inline-flex;align-items:center;gap:6px;transition:all .2s ease}
.footer-links a:hover{color:var(--accent);padding-left:6px}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:rgba(255,255,255,0.55);margin-bottom:12px}
.footer-contact li i{color:var(--accent);margin-top:4px}
.footer-qr{width:96px;height:96px;background:rgba(255,255,255,0.1);border-radius:12px;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,0.4);font-size:12px;text-align:center;border:1px dashed rgba(255,255,255,0.2)}
.footer-bottom{padding:24px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,0.4)}
.footer-bottom a{color:rgba(255,255,255,0.4);font-size:13px}
.footer-bottom a:hover{color:var(--accent)}
/* Back to top */
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;border-radius:50%;background:var(--primary);color:var(--accent);border:2px solid var(--accent);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:18px;z-index:999;opacity:0;visibility:hidden;transition:all .3s ease;box-shadow:0 4px 16px rgba(0,0,0,0.2)}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,201,167,0.3)}
.back-to-top:focus-visible{outline:3px solid rgba(0,201,167,0.5);outline-offset:2px}
/* Responsive */
@media (max-width:1024px){
  .nav-links{display:none}
  .nav-search{display:none}
  .burger-btn{display:flex}
  .nav-btn-login{display:none}
  .nav-btn-start{display:none}
  .hero h1{font-size:36px}
  .hero-login-card{position:relative;top:auto;right:auto;width:100%;margin-top:30px}
  .hero-content{padding-bottom:40px}
  .process-img-wrap{min-height:240px;margin-top:24px}
}
@media (max-width:768px){
  body{font-size:15px}
  .section-title{font-size:26px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:16px}
  .hero-cta-group{margin-bottom:30px}
  .footer-bottom{flex-direction:column;text-align:center}
  .mobile-menu{top:60px}
}
@media (max-width:520px){
  .hero{padding:60px 0 0}
  .hero h1{font-size:28px}
  .btn{padding:12px 24px;font-size:14px}
  .solution-card{padding:24px 20px}
  .news-card-body{padding:18px}
  .testimonial-card{padding:22px}
  .faq-question{padding:18px 20px;font-size:15px}
  .back-to-top{bottom:20px;right:20px;width:38px;height:38px}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --primary: #0B1D33;
  --brand: #00C9A7;
  --brand-dark: #00B294;
  --accent: #FF8A3D;
  --bg: #F5F7FA;
  --white: #FFFFFF;
  --title: #0B1D33;
  --text: #3D4A5C;
  --muted: #7A8699;
  --border: rgba(11, 29, 51, 0.08);
  --border-light: rgba(255, 255, 255, 0.12);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 8px;
  --radius-img: 12px;
  --shadow-card: 0 2px 8px rgba(11, 29, 51, 0.06);
  --shadow-hover: 0 12px 28px rgba(11, 29, 51, 0.12);
  --shadow-cta: 0 8px 24px rgba(0, 201, 167, 0.25);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition: all 0.25s ease;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-img);
}

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

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

ul, ol {
  list-style: none;
}

button, input {
  font-family: inherit;
  border: none;
  outline: none;
  background: none;
}

input:focus, button:focus {
  outline: none;
}

button:focus-visible, a:focus-visible, input:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--title);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.015em;
}

p {
  margin-bottom: 1.2em;
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.row {
  max-width: 100%;
  margin: 0;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--primary);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(11, 29, 51, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand), #00E0C0);
  border-radius: 10px;
  color: var(--primary);
  font-size: 17px;
  box-shadow: 0 4px 14px rgba(0, 201, 167, 0.3);
}

.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-text span {
  color: var(--brand);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
  position: relative;
  padding: 8px 2px;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--white);
}

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

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  border-radius: 3px;
  background: var(--brand);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0 16px;
  height: 38px;
  width: 200px;
  transition: var(--transition);
}

.nav-search i {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
}

.nav-search input {
  width: 100%;
  font-size: 13px;
  color: var(--white);
  background: transparent;
}

.nav-search input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.nav-search:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 10px 20px;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.4;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-primary {
  background: var(--brand);
  color: #04222A;
  box-shadow: var(--shadow-cta);
}

.btn-primary:hover {
  background: #00DDB9;
  color: #04222A;
  box-shadow: 0 12px 32px rgba(0, 201, 167, 0.35);
}

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

.btn-outline:hover {
  background: rgba(0, 201, 167, 0.1);
  color: var(--brand);
}

.btn-accent {
  background: var(--accent);
  color: var(--primary);
}

.btn-accent:hover {
  background: #FF9A5A;
  color: var(--primary);
}

.nav-btn-login {
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-btn);
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.nav-btn-login:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-1px);
}

.nav-btn-start {
  background: var(--brand);
  color: #04222A;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 10px 20px;
  cursor: pointer;
  box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.18), 0 6px 20px rgba(0, 201, 167, 0.3);
  transition: var(--transition);
}

.nav-btn-start:hover {
  background: #00DDB9;
  transform: translateY(-1px);
  box-shadow: 0 0 0 5px rgba(0, 201, 167, 0.15), 0 10px 28px rgba(0, 201, 167, 0.35);
}

.burger-btn {
  display: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}

.burger-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ===== 页头横幅 ===== */
.page-banner {
  position: relative;
  background: var(--primary);
  padding: 72px 0 68px;
  overflow: hidden;
}

.banner-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}

.banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(11, 29, 51, 0.96) 0%, rgba(11, 29, 51, 0.82) 60%, rgba(0, 201, 167, 0.15) 100%);
}

.banner-inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.breadcrumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.55);
}

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

.breadcrumb .sep {
  margin: 0 8px;
  opacity: 0.5;
}

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

.banner-inner h1 {
  font-size: 36px;
  font-weight: 800;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.banner-inner p {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 0;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 138, 61, 0.15);
  border: 1px solid rgba(255, 138, 61, 0.35);
  color: #FFB88D;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  margin-bottom: 20px;
}

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

/* ===== 主体区域 ===== */
.category-main {
  padding: 44px 0 60px;
}

.main-content {
  padding-right: 10px;
}

.sidebar {
  padding-left: 10px;
}

/* ===== 概述卡片 ===== */
.overview-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 32px 32px 28px;
  box-shadow: var(--shadow-card);
  margin-bottom: 28px;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.overview-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--brand);
}

.overview-card h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--title);
}

.overview-card p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
  margin-bottom: 0;
}

/* ===== 要点网格 ===== */
.point-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 28px;
}

.point-item {
  background: var(--white);
  border-radius: 14px;
  padding: 24px 22px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.point-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: rgba(0, 201, 167, 0.3);
}

.point-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(0, 201, 167, 0.1);
  color: var(--brand);
  font-size: 18px;
  margin-bottom: 14px;
}

.point-item:nth-child(2) .point-icon {
  background: rgba(255, 138, 61, 0.12);
  color: var(--accent);
}

.point-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.point-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin-bottom: 0;
}

/* ===== 大图位 ===== */
.feature-image {
  margin-bottom: 32px;
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.feature-image img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: 16px;
}

.feature-image::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 45%;
  background: linear-gradient(to top, rgba(11, 29, 51, 0.35), transparent);
  pointer-events: none;
}

/* ===== 图文交替区块 ===== */
.split-block {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 32px;
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}

.split-block.reverse {
  flex-direction: row-reverse;
}

.split-image {
  flex: 0 0 42%;
  overflow: hidden;
  border-radius: 12px;
}

.split-image img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 12px;
  transition: transform 0.5s ease;
}

.split-block:hover .split-image img {
  transform: scale(1.04);
}

.split-content {
  flex: 1;
}

.split-content .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--brand);
  background: rgba(0, 201, 167, 0.08);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 14px;
}

.split-content .tag i {
  font-size: 12px;
}

.split-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.split-content p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
  margin-bottom: 12px;
}

.split-content .link-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.split-content .link-more i {
  transition: transform 0.25s ease;
}

.split-content .link-more:hover i {
  transform: translateX(4px);
}

/* ===== 相关推荐 ===== */
.related-section {
  margin-top: 40px;
}

.related-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.related-head h2 {
  font-size: 22px;
  font-weight: 700;
}

.related-head .sub {
  font-size: 14px;
  color: var(--muted);
}

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

.related-card {
  background: var(--white);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(0, 201, 167, 0.3);
}

.related-card .card-img {
  position: relative;
  overflow: hidden;
}

.related-card .card-img img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.related-card .card-body {
  padding: 20px 20px 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.related-card .card-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card .card-body p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 12px;
  flex: 1;
}

.related-card .card-link {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.related-card .card-link i {
  font-size: 12px;
  transition: transform 0.25s ease;
}

.related-card .card-link:hover i {
  transform: translateX(4px);
}

/* ===== 侧栏 ===== */
.side-card {
  background: var(--white);
  border-radius: 14px;
  padding: 24px 22px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  margin-bottom: 24px;
}

.side-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 12px;
}

.side-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 36px;
  height: 3px;
  border-radius: 3px;
  background: var(--brand);
}

.side-links li {
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  transition: var(--transition);
}

.side-links li:last-child {
  border-bottom: none;
}

.side-links a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.side-links a i {
  color: var(--brand);
  font-size: 13px;
  transition: var(--transition);
}

.side-links li:hover a {
  color: var(--brand);
  transform: translateX(4px);
}

.side-links li:hover a i {
  transform: translateX(2px);
}

.guide-card {
  background: linear-gradient(135deg, rgba(0, 201, 167, 0.08), rgba(0, 201, 167, 0.04));
  border: 1px solid rgba(0, 201, 167, 0.2);
  border-radius: 14px;
  padding: 26px 24px;
  margin-bottom: 24px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.guide-card .guide-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--brand);
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 14px;
  box-shadow: 0 6px 18px rgba(0, 201, 167, 0.25);
}

.guide-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--title);
}

.guide-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 16px;
}

.guide-card .btn {
  width: 100%;
}

.cta-card {
  background: var(--primary);
  border-radius: 14px;
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(0, 201, 167, 0.15);
}

.cta-card::after {
  content: "";
  position: absolute;
  bottom: -30px;
  left: -30px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 138, 61, 0.1);
}

.cta-card h3 {
  position: relative;
  z-index: 1;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.cta-card p {
  position: relative;
  z-index: 1;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  margin-bottom: 18px;
}

.cta-card .btn {
  position: relative;
  z-index: 1;
  width: 100%;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 0;
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 4fr 2fr 3fr 3fr;
  gap: 36px;
  padding-bottom: 44px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 14px;
  max-width: 320px;
}

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

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

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

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}

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

.footer-contact li {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-contact i {
  color: var(--brand);
  font-size: 15px;
  width: 18px;
  text-align: center;
}

.footer-qr {
  width: 96px;
  height: 96px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 14px;
  text-align: center;
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  margin: 0;
}

.footer-bottom a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

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

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  border: 2px solid var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  box-shadow: var(--shadow-hover);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--brand);
  color: var(--primary);
  transform: translateY(-4px);
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) and (min-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(11, 29, 51, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    padding: 12px 8px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

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

  .nav-links a.active {
    color: var(--brand);
  }

  .burger-btn {
    display: flex;
  }

  .nav-search {
    display: none;
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

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

  .split-block, .split-block.reverse {
    flex-direction: column;
    padding: 22px;
    gap: 20px;
  }

  .split-image {
    flex: 0 0 100%;
    width: 100%;
  }

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

  .main-content, .sidebar {
    padding: 0;
  }
}

@media (max-width: 639px) {
  .nav-container {
    height: 60px;
    padding: 0 16px;
  }

  .brand-text {
    font-size: 16px;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 15px;
  }

  .nav-links {
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    background: rgba(11, 29, 51, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px;
    gap: 2px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    padding: 10px 6px;
    font-size: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

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

  .nav-links a.active {
    color: var(--brand);
  }

  .nav-search, .nav-btn-login {
    display: none;
  }

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

  .burger-btn {
    display: flex;
  }

  .page-banner {
    padding: 48px 0 44px;
  }

  .banner-inner h1 {
    font-size: 27px;
    line-height: 1.35;
  }

  .banner-inner p {
    font-size: 15px;
  }

  .category-main {
    padding: 28px 0 44px;
  }

  .overview-card {
    padding: 24px 20px;
  }

  .overview-card h2 {
    font-size: 19px;
  }

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

  .split-block, .split-block.reverse {
    flex-direction: column;
    padding: 20px;
    gap: 16px;
  }

  .split-image {
    flex: 0 0 100%;
    width: 100%;
  }

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

  .related-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .main-content, .sidebar {
    padding: 0;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .back-to-top {
    width: 40px;
    height: 40px;
    bottom: 20px;
    right: 20px;
    font-size: 14px;
  }
}

/* roulang page: article */
:root {
  --primary: #0B1D33;
  --primary-soft: #132A47;
  --accent: #00C9A7;
  --accent-dark: #00B596;
  --accent-light: rgba(0, 201, 167, 0.08);
  --orange: #FF8A3D;
  --bg: #F5F7FA;
  --white: #FFFFFF;
  --heading: #0B1D33;
  --text: #3D4A5C;
  --muted: #7A8699;
  --border: rgba(11, 29, 51, 0.08);
  --border-white: rgba(255, 255, 255, 0.12);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(11, 29, 51, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 29, 51, 0.10);
  --shadow-lg: 0 12px 28px rgba(11, 29, 51, 0.12);
  --accent-shadow: 0 8px 24px rgba(0, 201, 167, 0.25);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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

ul, ol {
  list-style: none;
}

button, input {
  font-family: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.row {
  max-width: 1200px;
  margin: 0 auto;
}

.row .row {
  max-width: none;
  margin: 0 -10px;
}

.columns {
  padding: 0 10px;
}

/* ===== 导航 ===== */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 72px;
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.site-header.header-scrolled {
  background: rgba(11, 29, 51, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent) 0%, #0AD6B2 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
  box-shadow: 0 4px 12px rgba(0, 201, 167, 0.3);
}

.brand-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.01em;
  line-height: 1.2;
  white-space: nowrap;
}

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

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

.nav-links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 8px 0;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: right 0.3s ease;
}

.nav-links a:hover {
  color: var(--white);
}

.nav-links a:hover::after {
  right: 0;
}

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

.nav-links a.active::after {
  right: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-search {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-search i {
  position: absolute;
  left: 14px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  pointer-events: none;
}

.nav-search input {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid transparent;
  border-radius: 999px;
  height: 36px;
  padding: 0 16px 0 36px;
  color: var(--white);
  font-size: 13px;
  width: 180px;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease, width 0.3s ease;
}

.nav-search input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.nav-search input:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.16);
  width: 220px;
}

.nav-btn-login {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
  font-size: 14px;
  font-weight: 500;
  padding: 7px 18px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-btn-login:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 201, 167, 0.08);
}

.nav-btn-start {
  background: var(--accent);
  border: none;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  padding: 8px 22px;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(0, 201, 167, 0.12), 0 4px 14px rgba(0, 201, 167, 0.25);
  transition: all 0.2s ease;
}

.nav-btn-start:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 0 6px rgba(0, 201, 167, 0.15), 0 6px 20px rgba(0, 201, 167, 0.35);
  background: #0AD6B2;
}

.burger-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--white);
  font-size: 22px;
  cursor: pointer;
  padding: 4px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
}

.btn:focus-visible {
  outline: 3px solid rgba(0, 201, 167, 0.4);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  box-shadow: 0 0 0 4px rgba(0, 201, 167, 0.12), 0 4px 14px rgba(0, 201, 167, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 6px rgba(0, 201, 167, 0.15), 0 8px 24px rgba(0, 201, 167, 0.35);
  color: var(--primary);
  background: #0AD6B2;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 0 4px rgba(0, 201, 167, 0.1), 0 2px 10px rgba(0, 201, 167, 0.2);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.btn-outline:hover {
  background: var(--accent-light);
  border-color: var(--accent-dark);
  color: var(--accent-dark);
}

.btn-outline-light {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.5);
  color: var(--white);
}

.btn-outline-light:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
}

/* ===== 面包屑 ===== */
.article-crumb {
  background: var(--primary);
  padding: 22px 0;
  border-bottom: 1px solid var(--border-white);
  position: relative;
  overflow: hidden;
}

.article-crumb::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 260px;
  height: 100%;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.15;
  pointer-events: none;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  position: relative;
  z-index: 1;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

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

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
}

.breadcrumb .current {
  color: var(--accent);
  font-weight: 500;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 文章主体 ===== */
.article-main {
  padding: 48px 0 72px;
  background: var(--bg);
}

.article-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 40px 44px;
  margin-bottom: 36px;
  position: relative;
}

.article-cover {
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 32px;
  aspect-ratio: 16/7;
  position: relative;
}

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

.article-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11, 29, 51, 0.25) 100%);
  pointer-events: none;
}

.article-cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.article-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
  font-size: 13px;
  color: var(--muted);
}

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

.article-meta i {
  color: var(--accent);
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-content p {
  margin-bottom: 1.2em;
  line-height: 1.9;
}

.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--heading);
  margin-top: 40px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
  position: relative;
  padding-left: 16px;
}

.article-content h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), rgba(0, 201, 167, 0.3));
  border-radius: 4px;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--heading);
  margin-top: 32px;
  margin-bottom: 12px;
}

.article-content img {
  width: 100%;
  border-radius: 12px;
  margin: 24px 0;
}

.article-content a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(0, 201, 167, 0.05);
  padding: 18px 24px;
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: var(--heading);
  font-size: 16px;
  line-height: 1.8;
}

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

.article-content ul,
.article-content ol {
  margin: 16px 0 24px;
  padding-left: 24px;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.article-content li::marker {
  color: var(--accent);
}

.article-content code {
  background: #F0F2F5;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, monospace;
  color: var(--primary);
}

.article-content pre {
  background: var(--primary);
  color: #E4F0F0;
  padding: 20px 24px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.6;
  font-size: 14px;
}

.article-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
  font-size: 14px;
}

.article-content th {
  background: rgba(0, 201, 167, 0.06);
  color: var(--heading);
  font-weight: 600;
}

/* ===== 相关推荐 ===== */
.related-posts {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin-bottom: 28px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
}

.section-head h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--heading);
  position: relative;
  padding-left: 14px;
  letter-spacing: -0.01em;
}

.section-head h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background: var(--accent);
  border-radius: 4px;
}

.section-head p {
  font-size: 14px;
  color: var(--muted);
}

.related-col {
  margin-bottom: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  height: 100%;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.related-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.related-thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.related-card:hover .related-thumb img {
  transform: scale(1.05);
}

.related-info {
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.related-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-light);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  align-self: flex-start;
}

.related-info h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.5;
  margin-bottom: 8px;
  transition: color 0.2s ease;
}

.related-card:hover .related-info h4 {
  color: var(--accent-dark);
}

.related-date {
  font-size: 12px;
  color: var(--muted);
  margin-top: auto;
}

/* ===== 返回链接 ===== */
.article-back {
  text-align: center;
  margin-bottom: 8px;
}

.article-back a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.article-back a:hover {
  color: var(--accent-dark);
  background: var(--accent-light);
}

/* ===== 侧栏 ===== */
.sidebar {
  padding-left: 10px;
}

.sidebar-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 26px 24px;
  margin-bottom: 24px;
}

.sidebar-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(0, 201, 167, 0.15);
  position: relative;
}

.sidebar-category-list li {
  border-radius: 10px;
  transition: background 0.2s ease;
}

.sidebar-category-list li + li {
  margin-top: 4px;
}

.sidebar-category-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.sidebar-category-list a i:first-child {
  width: 20px;
  text-align: center;
  color: var(--muted);
  transition: color 0.2s ease;
}

.sidebar-category-list a .arrow {
  margin-left: auto;
  font-size: 11px;
  color: var(--muted);
  transition: transform 0.2s ease, color 0.2s ease;
}

.sidebar-category-list a:hover {
  background: var(--accent-light);
  color: var(--accent-dark);
  transform: translateX(3px);
}

.sidebar-category-list a:hover i:first-child,
.sidebar-category-list a:hover .arrow {
  color: var(--accent);
}

.sidebar-category-list a.active-cat {
  background: rgba(0, 201, 167, 0.1);
  color: var(--accent-dark);
  font-weight: 600;
}

.sidebar-category-list a.active-cat i:first-child,
.sidebar-category-list a.active-cat .arrow {
  color: var(--accent);
}

.sidebar-post-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.sidebar-post-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-post-list li:first-child {
  padding-top: 0;
}

.sidebar-post-list a {
  display: block;
  transition: transform 0.2s ease;
}

.sidebar-post-list a:hover {
  transform: translateX(4px);
}

.sidebar-post-list .post-title {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--heading);
  line-height: 1.55;
  margin-bottom: 6px;
  transition: color 0.2s ease;
}

.sidebar-post-list a:hover .post-title {
  color: var(--accent-dark);
}

.sidebar-post-list .post-meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

.sidebar-cta {
  background: linear-gradient(145deg, var(--primary) 0%, var(--primary-soft) 100%);
  color: rgba(255, 255, 255, 0.8);
  border: none;
  position: relative;
  overflow: hidden;
}

.sidebar-cta::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 130px;
  height: 130px;
  background: radial-gradient(circle, rgba(0, 201, 167, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.sidebar-cta h3 {
  color: var(--white);
  border-bottom-color: var(--border-white);
}

.sidebar-cta p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.sidebar-cta .btn {
  margin-bottom: 16px;
}

.sidebar-cta-note {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

.sidebar-cta-note i {
  color: var(--accent);
}

/* ===== CTA区块 ===== */
.site-cta-section {
  background: var(--primary);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}

.site-cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}

.site-cta-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: 30%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 201, 167, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.cta-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}

.cta-content h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.cta-content p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.6);
}

.cta-actions {
  display: flex;
  gap: 16px;
  flex-shrink: 0;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary);
  border-top: 1px solid var(--border-white);
  padding: 64px 0 0;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer .footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 12px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 18px;
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

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

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 12px;
}

.footer-contact i {
  color: var(--accent);
  width: 16px;
}

.footer-qr {
  width: 84px;
  height: 84px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-white);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 16px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  margin-top: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  transition: color 0.2s ease;
}

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

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 30px;
  width: 44px;
  height: 44px;
  background: var(--accent);
  color: var(--primary);
  border: none;
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  box-shadow: var(--accent-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s ease;
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #0AD6B2;
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 201, 167, 0.35);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-links {
    gap: 16px;
  }
  .nav-search input {
    width: 140px;
  }
  .nav-search input:focus {
    width: 180px;
  }
  .nav-btn-start {
    padding: 8px 16px;
  }
}

@media (max-width: 640px) {
  .site-header, .nav-container {
    height: 60px;
  }
  .nav-container {
    padding: 0 16px;
  }
  .brand-text {
    font-size: 16px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(11, 29, 51, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1001;
  }
  .nav-links.nav-open {
    display: flex;
  }
  .nav-links a {
    padding: 14px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 16px;
  }
  .nav-links a::after {
    display: none;
  }
  .nav-links a.active {
    color: var(--accent);
    background: rgba(0, 201, 167, 0.06);
    border-radius: 8px;
    padding-left: 14px;
  }
  .nav-actions {
    gap: 8px;
  }
  .nav-search,
  .nav-btn-login,
  .nav-btn-start {
    display: none;
  }
  .burger-btn {
    display: block;
  }
  .nav-actions.nav-actions-open .nav-search,
  .nav-actions.nav-actions-open .nav-btn-login,
  .nav-actions.nav-actions-open .nav-btn-start {
    display: flex;
  }
  .article-main {
    padding: 24px 0 48px;
  }
  .article-card {
    padding: 24px 20px;
  }
  .article-title {
    font-size: 26px;
  }
  .article-meta {
    gap: 12px;
    font-size: 12px;
  }
  .article-cover {
    aspect-ratio: 16/9;
  }
  .related-posts {
    padding: 20px 16px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .cta-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  .cta-content h2 {
    font-size: 24px;
  }
  .site-footer {
    padding-top: 48px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .brand-text {
    font-size: 15px;
  }
  .article-crumb {
    padding: 16px 0;
  }
  .breadcrumb .current {
    max-width: 200px;
  }
  .related-info h4 {
    font-size: 14px;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --navy: #0B1D33;
  --primary: #00C9A7;
  --accent: #FF8A3D;
  --bg: #F5F7FA;
  --title: #0B1D33;
  --body: #3D4A5C;
  --muted: #7A8699;
  --white: #FFFFFF;
  --border: rgba(11,29,51,0.08);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 2px 8px rgba(11,29,51,0.06);
  --shadow-hover: 0 12px 28px rgba(11,29,51,0.12);
  --transition: all 0.25s ease;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.8;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
button { font-family: var(--font-main); cursor: pointer; border: none; background: none; }
input, textarea { font-family: var(--font-main); outline: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--title); letter-spacing: -0.02em; line-height: 1.3; font-weight: 700; }
h1 { font-size: 38px; }
h2 { font-size: 28px; }
h3 { font-size: 18px; font-weight: 600; }
p { margin-bottom: 1.2em; }
i[class*="fa-"] { margin-right: 6px; }

/* ===== 通用容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 页头导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  height: 72px;
  background: rgba(11,29,51,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(11,29,51,0.98);
  box-shadow: 0 8px 30px rgba(11,29,51,0.22);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, #00a48b 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #04222A;
  font-size: 18px;
  box-shadow: 0 4px 14px rgba(0,201,167,0.3);
}
.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand-text span {
  color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: rgba(255,255,255,0.78);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
  position: relative;
  transition: var(--transition);
}
.nav-links a:hover {
  color: var(--primary);
  background: rgba(0,201,167,0.08);
}
.nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -2px;
  width: 22px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.nav-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.12);
  border-radius: 999px;
  padding: 0 6px 0 14px;
  height: 36px;
  width: 180px;
  transition: var(--transition);
}
.nav-search i {
  color: rgba(255,255,255,0.5);
  font-size: 13px;
  margin-right: 0;
}
.nav-search input {
  background: transparent;
  border: none;
  color: var(--white);
  font-size: 13px;
  width: 100%;
  padding: 0 8px;
}
.nav-search input::placeholder {
  color: rgba(255,255,255,0.4);
}
.nav-search:focus-within {
  border: 1px solid rgba(0,201,167,0.6);
  background: rgba(0,201,167,0.1);
}
.nav-btn-login {
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.25);
  transition: var(--transition);
}
.nav-btn-login:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.nav-btn-start {
  background: var(--primary);
  color: #04222A;
  font-size: 14px;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 8px;
  box-shadow: 0 0 0 3px rgba(0,201,167,0.15), 0 6px 20px rgba(0,201,167,0.3);
  transition: var(--transition);
}
.nav-btn-start:hover {
  background: #00b494;
  transform: translateY(-1px);
  box-shadow: 0 0 0 5px rgba(0,201,167,0.2), 0 10px 28px rgba(0,201,167,0.4);
}
.burger-btn {
  display: none;
  background: none;
  color: var(--white);
  font-size: 22px;
  padding: 8px;
}
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== 页头 Banner ===== */
.page-hero {
  position: relative;
  background-color: var(--navy);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 84px 0 74px;
  color: var(--white);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11,29,51,0.94) 0%, rgba(11,29,51,0.78) 50%, rgba(11,29,51,0.55) 100%);
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb-custom {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb-custom a {
  color: rgba(255,255,255,0.6);
}
.breadcrumb-custom a:hover {
  color: var(--primary);
}
.breadcrumb-custom i {
  font-size: 10px;
  color: rgba(255,255,255,0.3);
}
.page-hero h1 {
  color: var(--white);
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.25;
}
.page-hero h1 .accent-text {
  color: var(--primary);
}
.page-hero .hero-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.8);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,138,61,0.18);
  border: 1px solid rgba(255,138,61,0.4);
  color: #FFB866;
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.hero-badge i {
  font-size: 11px;
}

/* ===== 主内容区 ===== */
.main-section {
  padding: 64px 0 80px;
  background: var(--bg);
}
.main-content-area {
  padding-right: 8px;
}

/* ===== 概述块 ===== */
.content-intro {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 30px;
  margin-bottom: 30px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}
.content-intro p {
  margin-bottom: 0;
  font-size: 15.5px;
  line-height: 1.9;
}

/* ===== 2列要点网格 ===== */
.feature-grid {
  margin-bottom: 30px;
}
.feature-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 26px;
  height: 100%;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.feature-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.feature-item:hover::before {
  transform: scaleX(1);
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0,201,167,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 14px;
}
.feature-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--title);
}
.feature-item p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 0;
  line-height: 1.75;
}

/* ===== 大图位 ===== */
.feature-image {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 38px;
  position: relative;
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 9;
}
.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.feature-image:hover img {
  transform: scale(1.03);
}
.feature-image .image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px 24px 16px;
  background: linear-gradient(to top, rgba(11,29,51,0.82), transparent);
  color: rgba(255,255,255,0.92);
  font-size: 13px;
  line-height: 1.6;
}

/* ===== 编号流程 ===== */
.process-section {
  margin-bottom: 44px;
}
.section-title-wrap {
  margin-bottom: 28px;
  position: relative;
}
.section-title-wrap .section-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.section-title-wrap h2 {
  font-size: 26px;
  margin-bottom: 6px;
}
.section-title-wrap p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 0;
}
.process-steps {
  position: relative;
  padding-left: 0;
}
.process-steps::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 30px;
  bottom: 30px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), rgba(0,201,167,0.1));
}
.process-step {
  display: flex;
  gap: 22px;
  margin-bottom: 26px;
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
  position: relative;
  transition: var(--transition);
  border: 1px solid var(--border);
}
.process-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
}
.step-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--navy), #1a3a5c);
  color: var(--primary);
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 3px solid rgba(0,201,167,0.3);
  font-family: "DIN Alternate", "Bahnschrift", sans-serif;
  font-style: normal;
}
.step-content h3 {
  font-size: 17px;
  margin-bottom: 6px;
}
.step-content p {
  font-size: 14px;
  color: var(--body);
  margin-bottom: 0;
  line-height: 1.8;
}

/* ===== 赛事热点列表 ===== */
.dynamic-list-section {
  margin-bottom: 44px;
}
.topic-list {
  background: var(--white);
  border-radius: var(--radius);
  padding: 8px 0;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.topic-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.topic-list li:last-child {
  border-bottom: none;
}
.topic-list li:hover {
  background: rgba(0,201,167,0.04);
  padding-left: 30px;
}
.topic-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}
.topic-list .topic-title {
  flex: 1;
  font-size: 15px;
  font-weight: 500;
  color: var(--title);
  line-height: 1.5;
}
.topic-list li:hover .topic-title {
  color: var(--primary);
}
.topic-tag {
  flex-shrink: 0;
  font-size: 12px;
  background: rgba(255,138,61,0.12);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}
.topic-date {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--muted);
  font-family: "DIN Alternate", "Bahnschrift", sans-serif;
}
.topic-arrow {
  color: var(--muted);
  font-size: 13px;
  opacity: 0;
  transform: translateX(-6px);
  transition: var(--transition);
}
.topic-list li:hover .topic-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--primary);
}

/* ===== 相关推荐 ===== */
.related-cards-section {
  margin-bottom: 10px;
}
.related-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px 22px;
  height: 100%;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.related-card .related-icon {
  font-size: 22px;
  color: var(--primary);
}
.related-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--title);
  margin: 4px 0 0;
}
.related-card p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 0;
  line-height: 1.7;
  flex: 1;
}
.related-card .related-link {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.related-card .related-link i {
  font-size: 11px;
  transition: transform 0.25s ease;
  margin-right: 0;
}
.related-card:hover .related-link i {
  transform: translateX(4px);
}

/* ===== 侧栏 ===== */
.sidebar {
  padding-left: 12px;
}
.sidebar-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 26px 26px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.sidebar-card h3 {
  font-size: 17px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 2px solid rgba(0,201,167,0.2);
  position: relative;
}
.sidebar-card h3::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--primary);
}
.sidebar-links li {
  border-bottom: 1px solid var(--border);
}
.sidebar-links li:last-child {
  border-bottom: none;
}
.sidebar-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 2px;
  font-size: 14px;
  color: var(--body);
  transition: var(--transition);
}
.sidebar-links a i {
  font-size: 12px;
  color: var(--primary);
  width: 18px;
  text-align: center;
  margin-right: 0;
}
.sidebar-links a:hover {
  color: var(--primary);
  padding-left: 8px;
}
.guide-card {
  background: linear-gradient(135deg, rgba(0,201,167,0.08) 0%, rgba(255,255,255,0.95) 100%);
  border: 1px solid rgba(0,201,167,0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.guide-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.8;
  margin-bottom: 16px;
}
.guide-card .guide-list {
  margin-bottom: 18px;
}
.guide-card .guide-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--body);
  margin-bottom: 10px;
  line-height: 1.6;
}
.guide-card .guide-list li i {
  color: var(--primary);
  font-size: 13px;
  margin-top: 4px;
}
.cta-card {
  background: var(--navy);
  border-color: transparent;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(0,201,167,0.15);
}
.cta-card h3 {
  color: var(--white);
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 12px;
}
.cta-card h3::after {
  display: none;
}
.cta-card p {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 20px;
  line-height: 1.7;
}
.cta-card .btn-primary {
  width: 100%;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #04222A;
  font-size: 14px;
  font-weight: 700;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-primary:hover {
  background: #00b494;
  color: #04222A;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,201,167,0.35);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 26px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--primary);
  transition: var(--transition);
}
.btn-outline:hover {
  background: rgba(0,201,167,0.08);
  color: var(--primary);
}
.btn-glow {
  box-shadow: 0 0 0 4px rgba(0,201,167,0.15), 0 8px 30px rgba(0,201,167,0.35);
}
.btn-light-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(255,255,255,0.6);
  transition: var(--transition);
}
.btn-light-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0,201,167,0.1);
}

/* ===== CTA区块 ===== */
.cta-section {
  position: relative;
  background-color: var(--navy);
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  padding: 80px 0;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(11,29,51,0.88);
}
.cta-section::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}
.cta-section .container {
  position: relative;
  z-index: 2;
}
.cta-section h2 {
  color: var(--white);
  font-size: 30px;
  margin-bottom: 14px;
}
.cta-section p {
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  max-width: 640px;
  margin: 0 auto 30px;
  line-height: 1.8;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.65);
  padding: 60px 0 0;
  font-size: 14px;
}
.site-footer .footer-top {
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin: 0 auto -24px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,0.6);
  margin: 16px 0 0;
}
.footer-title {
  color: var(--white);
  font-size: 16px;
  margin-bottom: 18px;
  font-weight: 600;
  position: relative;
  padding-bottom: 8px;
}
.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--primary);
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255,255,255,0.55);
  font-size: 14px;
  transition: var(--transition);
}
.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: rgba(255,255,255,0.55);
  font-size: 14px;
}
.footer-contact i {
  color: var(--primary);
  width: 18px;
  text-align: center;
  margin-right: 0;
}
.footer-qr {
  width: 76px;
  height: 76px;
  background: rgba(255,255,255,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.4);
  font-size: 12px;
  margin-top: 10px;
  border: 1px dashed rgba(255,255,255,0.2);
}
.footer-bottom {
  padding: 22px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p {
  margin-bottom: 0;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a:hover {
  color: var(--primary);
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--primary);
  font-size: 16px;
  border: 2px solid rgba(0,201,167,0.4);
  box-shadow: 0 8px 24px rgba(0,201,167,0.2);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: var(--transition);
}
.back-to-top i {
  margin-right: 0;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary);
  color: #04222A;
  transform: translateY(-3px);
}

/* ===== Foundation 重置 ===== */
.columns { margin-bottom: 0; }
.row { max-width: none; }

/* ===== 响应式 ===== */
@media screen and (max-width: 1023px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    box-shadow: 0 12px 30px rgba(11,29,51,0.3);
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
    color: rgba(255,255,255,0.8);
  }
  .nav-links a.active {
    background: rgba(0,201,167,0.1);
  }
  .nav-links a.active::after {
    display: none;
  }
  .burger-btn {
    display: block;
  }
  .nav-search {
    width: 130px;
  }
  .brand-text {
    font-size: 17px;
  }
  .sidebar {
    padding-left: 0;
    margin-top: 40px;
  }
  .main-content-area {
    padding-right: 0;
  }
}
@media screen and (max-width: 639px) {
  .nav-container {
    height: 60px;
    padding: 0 16px;
  }
  .site-header {
    height: 60px;
  }
  .nav-actions .nav-search,
  .nav-actions .nav-btn-login {
    display: none;
  }
  .brand-icon {
    width: 34px;
    height: 34px;
    font-size: 15px;
  }
  .brand-text {
    font-size: 16px;
  }
  .page-hero {
    padding: 56px 0 50px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .page-hero .hero-desc {
    font-size: 15px;
  }
  .main-section {
    padding: 40px 0 56px;
  }
  .content-intro {
    padding: 22px 20px;
  }
  .feature-item {
    padding: 20px;
    margin-bottom: 16px;
  }
  .process-step {
    padding: 18px;
    gap: 14px;
    flex-direction: column;
  }
  .process-steps::before {
    left: 27px;
  }
  .topic-list li {
    padding: 14px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .topic-arrow {
    display: none;
  }
  .cta-section {
    padding: 56px 0;
  }
  .cta-section h2 {
    font-size: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .back-to-top {
    bottom: 18px;
    right: 18px;
    width: 38px;
    height: 38px;
  }
}

/* roulang page: category3 */
:root {
  --navy: #0B1D33;
  --navy-light: #132C47;
  --teal: #00C9A7;
  --teal-dark: #00A98C;
  --teal-bg: rgba(0, 201, 167, 0.08);
  --orange: #FF8A3D;
  --bg: #F5F7FA;
  --white: #FFFFFF;
  --title: #0B1D33;
  --text: #3D4A5C;
  --muted: #7A8699;
  --border: rgba(11, 29, 51, 0.08);
  --border-dark: rgba(255, 255, 255, 0.12);
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow-card: 0 2px 8px rgba(11, 29, 51, 0.06);
  --shadow-hover: 0 12px 28px rgba(11, 29, 51, 0.12);
  --container-w: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease, background 0.2s ease; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5 { color: var(--title); letter-spacing: -0.02em; line-height: 1.35; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
.row { max-width: 100%; width: 100%; margin-left: auto; margin-right: auto; }
.row .columns { padding-left: 15px; padding-right: 15px; }

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 29, 51, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 24px rgba(11, 29, 51, 0.25); }
.nav-container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.brand-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #04222A;
  font-size: 18px;
  flex-shrink: 0;
}
.brand-text { color: #fff; font-size: 20px; font-weight: 700; letter-spacing: -0.02em; white-space: nowrap; }
.brand-text span { color: var(--teal); }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  position: relative;
  white-space: nowrap;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.06); }
.nav-links a.active { color: var(--teal); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--teal);
  border-radius: 2px;
}
.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-search { position: relative; display: flex; align-items: center; }
.nav-search i { position: absolute; left: 14px; color: rgba(255, 255, 255, 0.5); font-size: 14px; pointer-events: none; }
.nav-search input {
  width: 190px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  padding: 0 14px 0 38px;
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.nav-search input::placeholder { color: rgba(255, 255, 255, 0.4); }
.nav-search input:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.15);
}
.nav-btn-login {
  height: 40px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: transparent;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-btn-login:hover { border-color: var(--teal); color: var(--teal); }
.nav-btn-start {
  height: 40px;
  padding: 0 22px;
  background: var(--teal);
  color: #04222A;
  font-size: 14px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-btn);
  transition: all 0.2s;
  box-shadow: 0 0 0 rgba(0, 201, 167, 0);
  white-space: nowrap;
}
.nav-btn-start:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 201, 167, 0.3);
}
.nav-btn-login:focus-visible,
.nav-btn-start:focus-visible,
.burger-btn:focus-visible {
  outline: 3px solid rgba(0, 201, 167, 0.5);
  outline-offset: 2px;
}
.burger-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 17px;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
}
.burger-btn:hover { background: rgba(255, 255, 255, 0.14); }
.mobile-menu {
  display: none;
  background: var(--navy);
  border-top: 1px solid var(--border-dark);
  padding: 12px 16px 20px;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 14px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  margin-bottom: 4px;
}
.mobile-menu a:hover { background: rgba(255, 255, 255, 0.06); color: #fff; }
.mobile-menu a.active { color: var(--teal); background: rgba(0, 201, 167, 0.08); }

/* Page Hero Banner */
.page-hero {
  background: linear-gradient(135deg, rgba(11, 29, 51, 0.96) 0%, rgba(11, 29, 51, 0.84) 55%, rgba(0, 201, 167, 0.18) 100%),
              url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  padding: 72px 0 60px;
  color: #fff;
}
.page-hero .breadcrumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.page-hero .breadcrumb a { color: rgba(255, 255, 255, 0.7); }
.page-hero .breadcrumb a:hover { color: var(--teal); }
.page-hero .breadcrumb .sep { color: rgba(255, 255, 255, 0.35); }
.page-hero .breadcrumb .current { color: var(--teal); }
.page-hero h1 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
}
.page-hero .hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.78);
  max-width: 700px;
  line-height: 1.8;
}

/* Main Layout */
.page-main { padding: 64px 0 80px; }

/* Sections */
.section-title { font-size: 26px; font-weight: 700; color: var(--title); letter-spacing: -0.02em; margin-bottom: 10px; }
.section-desc { color: var(--muted); font-size: 15px; margin-bottom: 24px; line-height: 1.7; }

/* Overview Block */
.overview-block {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  margin-bottom: 32px;
}
.overview-text { color: var(--text); font-size: 16px; line-height: 1.9; margin-bottom: 8px; }
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 28px;
}
.stat-item {
  background: var(--bg);
  border-radius: 14px;
  padding: 20px 14px;
  text-align: center;
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.stat-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.stat-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--navy);
  font-family: "DIN Alternate", "Bahnschrift", "PingFang SC", sans-serif;
  line-height: 1.2;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.stat-num .unit { color: var(--teal); font-size: 15px; font-weight: 700; }
.stat-label { font-size: 13px; color: var(--muted); margin-top: 8px; line-height: 1.4; }

/* Security Cards */
.security-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}
.sec-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}
.sec-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--teal-dark));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.sec-card:hover::before { transform: scaleX(1); }
.sec-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.sec-card:nth-child(2) { background: linear-gradient(145deg, #fff 0%, rgba(0, 201, 167, 0.04) 100%); }
.sec-card .icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--teal-bg);
  color: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}
.sec-card h3 { font-size: 18px; font-weight: 700; color: var(--title); margin-bottom: 10px; }
.sec-card p { font-size: 14px; color: var(--text); line-height: 1.7; margin-bottom: 12px; }
.sec-card ul li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}
.sec-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

/* Feature Block */
.feature-block { margin-bottom: 32px; }
.feature-img {
  width: 100%;
  aspect-ratio: 16 / 8;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
}
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.feature-item {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s;
}
.feature-item:hover { box-shadow: var(--shadow-hover); }
.feature-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.feature-item h3 i { color: var(--teal); font-size: 16px; }
.feature-item ul li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 8px;
}
.feature-item ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: 700;
}

/* Recommend Block */
.recommend-block {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}
.recommend-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.recommend-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  transition: transform 0.25s, box-shadow 0.25s;
}
.recommend-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.recommend-item img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.rec-body { padding: 18px; }
.rec-body h4 { font-size: 15px; font-weight: 600; color: var(--title); margin-bottom: 6px; }
.rec-body p { font-size: 13px; color: var(--muted); line-height: 1.6; margin-bottom: 4px; }
.rec-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--teal-dark);
  margin-top: 8px;
}
.rec-link i { font-size: 12px; transition: transform 0.2s; }
.recommend-item:hover .rec-link i { transform: translateX(4px); }

/* Sidebar */
.sidebar-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  margin-bottom: 24px;
}
.sidebar-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--teal);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-links li { border-bottom: 1px solid var(--border); }
.sidebar-links li:last-child { border-bottom: none; }
.sidebar-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 4px;
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
  transition: all 0.2s;
}
.sidebar-links a i { font-size: 12px; color: var(--muted); transition: transform 0.2s, color 0.2s; }
.sidebar-links a:hover { color: var(--teal-dark); padding-left: 8px; }
.sidebar-links a:hover i { transform: translateX(3px); color: var(--teal); }

.guide-card {
  background: linear-gradient(135deg, rgba(0, 201, 167, 0.12), rgba(0, 201, 167, 0.04));
  border-color: rgba(0, 201, 167, 0.22);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.guide-card h3 { border-bottom-color: rgba(0, 201, 167, 0.25); }
.guide-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--navy);
  border-bottom: 1px solid rgba(0, 201, 167, 0.15);
}
.guide-list li:last-child { border-bottom: none; }
.guide-list li i { color: var(--teal); width: 20px; text-align: center; }
.btn-guide {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 14px;
  height: 44px;
  background: var(--navy);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-btn);
  border: none;
  transition: all 0.2s;
}
.btn-guide:hover { background: var(--navy-light); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(11, 29, 51, 0.2); }

.cta-side-card {
  background: linear-gradient(145deg, var(--navy), #0A2B45);
  color: #fff;
  border: none;
  position: relative;
  overflow: hidden;
}
.cta-side-card::after {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 140px;
  height: 140px;
  background: rgba(0, 201, 167, 0.14);
  border-radius: 50%;
}
.cta-side-card h3 { color: #fff; border-bottom-color: rgba(255, 255, 255, 0.15); }
.cta-side-card p { font-size: 14px; color: rgba(255, 255, 255, 0.68); line-height: 1.7; margin-bottom: 18px; }
.btn-side-primary {
  display: block;
  width: 100%;
  padding: 12px;
  background: var(--teal);
  color: #04222A;
  font-weight: 700;
  border-radius: var(--radius-btn);
  border: none;
  text-align: center;
  font-size: 14px;
  transition: all 0.2s;
  position: relative;
  z-index: 1;
}
.btn-side-primary:hover { background: var(--teal-dark); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0, 201, 167, 0.3); }
.btn-side-secondary {
  display: block;
  width: 100%;
  padding: 12px;
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-btn);
  text-align: center;
  font-size: 14px;
  transition: all 0.2s;
  margin-top: 10px;
  position: relative;
  z-index: 1;
}
.btn-side-secondary:hover { border-color: var(--teal); color: var(--teal); }

/* FAQ Section */
.faq-section { padding: 72px 0; background: #fff; border-top: 1px solid var(--border); }
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-header { text-align: center; margin-bottom: 36px; }
.faq-header .section-title { font-size: 30px; }
.faq-header p { color: var(--muted); font-size: 15px; }
.faq-list { border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  padding: 20px 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--title);
  text-align: left;
  transition: color 0.2s;
}
.faq-q:hover { color: var(--teal-dark); }
.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--teal-bg);
  color: var(--teal-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
  transition: transform 0.3s, background 0.3s, color 0.3s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--teal);
  color: #04222A;
}
.faq-a { display: none; padding: 0 28px 20px 8px; font-size: 15px; color: var(--text); line-height: 1.8; }
.faq-item.open .faq-a { display: block; }
.faq-q:focus-visible {
  outline: 3px solid rgba(0, 201, 167, 0.35);
  outline-offset: -2px;
  border-radius: 6px;
}

/* CTA Section */
.site-cta {
  background: linear-gradient(135deg, var(--navy) 0%, #0A2B45 60%, rgba(0, 201, 167, 0.25) 100%),
              url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  padding: 88px 0;
  text-align: center;
  color: #fff;
  position: relative;
}
.site-cta h2 { font-size: 34px; font-weight: 800; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.site-cta p { color: rgba(255, 255, 255, 0.72); font-size: 17px; max-width: 640px; margin: 0 auto 36px; line-height: 1.7; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: var(--teal);
  color: #04222A;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-btn);
  border: none;
  transition: all 0.25s;
  box-shadow: 0 0 0 4px rgba(0, 201, 167, 0.15), 0 8px 30px rgba(0, 201, 167, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 6px rgba(0, 201, 167, 0.2), 0 12px 36px rgba(0, 201, 167, 0.45); }
.btn-primary:focus-visible,
.btn-outline:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: transparent;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 2px solid rgba(255, 255, 255, 0.45);
  transition: all 0.25s;
}
.btn-outline:hover { border-color: var(--teal); color: var(--teal); transform: translateY(-2px); }

/* Footer */
.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.65);
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.site-footer .brand-text { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, 0.55); max-width: 320px; }
.footer-title { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255, 255, 255, 0.55); font-size: 14px; transition: all 0.2s; }
.footer-links a:hover { color: var(--teal); padding-left: 4px; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 12px;
}
.footer-contact i { color: var(--teal); width: 18px; text-align: center; }
.footer-qr {
  width: 72px;
  height: 72px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  background: #fff;
  color: var(--navy);
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 6px;
  text-align: center;
  line-height: 1.4;
  font-weight: 600;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 40px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p { font-size: 13px; color: rgba(255, 255, 255, 0.4); margin: 0; }
.footer-bottom a { font-size: 13px; color: rgba(255, 255, 255, 0.4); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--teal); }

/* Back to Top */
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--teal);
  color: #04222A;
  border: none;
  font-size: 16px;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 201, 167, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s;
  z-index: 999;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0, 201, 167, 0.5); }
.back-to-top:focus-visible { outline: 3px solid rgba(0, 201, 167, 0.5); outline-offset: 2px; }

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .nav-links,
  .nav-search,
  .nav-btn-login,
  .nav-btn-start { display: none; }
  .burger-btn { display: inline-flex; }
  .page-hero { padding: 56px 0 44px; }
  .page-hero h1 { font-size: 32px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .security-cards { gap: 16px; }
}

@media (max-width: 768px) {
  .nav-container { height: 60px; gap: 16px; }
  .brand-text { font-size: 17px; }
  .brand-icon { width: 36px; height: 36px; font-size: 16px; }
  .page-hero h1 { font-size: 28px; }
  .page-hero .hero-desc { font-size: 15px; }
  .page-main { padding: 40px 0 56px; }
  .security-cards { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-img { aspect-ratio: 16 / 10; }
  .recommend-grid { grid-template-columns: 1fr; }
  .faq-section { padding: 48px 0; }
  .faq-header .section-title { font-size: 26px; }
  .site-cta { padding: 60px 0; }
  .site-cta h2 { font-size: 26px; }
  .site-cta p { font-size: 15px; }
  .sidebar-col { margin-top: 24px; }
  .footer-top .columns { margin-bottom: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container, .nav-container { padding: 0 16px; }
  .nav-container { gap: 12px; }
  .brand-icon { width: 34px; height: 34px; font-size: 15px; }
  .brand-text { font-size: 16px; }
  .page-hero { padding: 44px 0 36px; }
  .page-hero h1 { font-size: 24px; }
  .page-hero .hero-desc { font-size: 14px; }
  .stats-row { gap: 10px; }
  .stat-item { padding: 14px 10px; }
  .stat-num { font-size: 22px; }
  .stat-label { font-size: 12px; }
  .overview-block, .recommend-block { padding: 20px; }
  .sec-card, .feature-item { padding: 20px; }
  .section-title { font-size: 22px; }
  .faq-q { font-size: 15px; padding: 16px 4px; }
  .faq-a { padding-left: 8px; padding-right: 8px; }
  .site-cta h2 { font-size: 22px; }
  .cta-btns { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; padding: 13px 24px; }
  .back-to-top { right: 16px; bottom: 16px; width: 40px; height: 40px; }
}