/* roulang page: index */
:root{
  --primary:#ff9f1c;
  --primary-hover:#ffb347;
  --primary-dark:#d97e06;
  --accent:#00d4ff;
  --accent-hover:#33dfff;
  --bg-page:#0b0f1a;
  --bg-section:#0e1422;
  --bg-card:#141c2d;
  --bg-card-hover:#1a2438;
  --bg-input:#0b0f1a;
  --text-main:#eef3fc;
  --text-muted:#8a96ad;
  --text-weak:#5d6982;
  --border-soft:rgba(255,255,255,0.08);
  --border-strong:rgba(255,255,255,0.14);
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:24px;
  --shadow-sm:0 2px 12px rgba(0,0,0,0.3);
  --shadow-md:0 8px 30px rgba(0,0,0,0.35);
  --shadow-lg:0 16px 48px rgba(0,0,0,0.45);
  --space-section:90px;
  --font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-family);
  background:var(--bg-page);
  color:var(--text-main);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit}
ul,ol{list-style:none}
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.section{
  padding:var(--space-section) 0;
  position:relative;
}
.section-alt{
  background:var(--bg-section);
}
.section-header{
  text-align:center;
  max-width:680px;
  margin:0 auto 52px;
}
.section-header .tag{
  display:inline-block;
  padding:6px 16px;
  border:1px solid rgba(255,159,28,0.4);
  border-radius:999px;
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  letter-spacing:1px;
  margin-bottom:16px;
  background:rgba(255,159,28,0.08);
}
.section-header h2{
  font-size:38px;
  font-weight:800;
  letter-spacing:1px;
  margin-bottom:14px;
  line-height:1.3;
}
.section-header p{
  color:var(--text-muted);
  font-size:16px;
}
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:13px 30px;
  border-radius:10px;
  font-size:15px;
  font-weight:600;
  border:none;
  text-align:center;
  transition:all .3s ease;
  cursor:pointer;
  line-height:1.4;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#0b0f1a;
  box-shadow:0 4px 20px rgba(255,159,28,0.3);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 30px rgba(255,159,28,0.42);
  background:linear-gradient(135deg,var(--primary-hover),var(--primary));
}
.btn-outline{
  background:transparent;
  border:1px solid var(--border-strong);
  color:var(--text-main);
}
.btn-outline:hover{
  border-color:var(--accent);
  color:var(--accent);
  transform:translateY(-2px);
}
.btn-accent{
  background:linear-gradient(135deg,var(--accent),#0088ff);
  color:#0b0f1a;
  box-shadow:0 4px 20px rgba(0,212,255,0.25);
}
.btn-accent:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 30px rgba(0,212,255,0.35);
}
.badge{
  display:inline-block;
  padding:4px 14px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  background:rgba(255,159,28,0.14);
  color:var(--primary);
  border:1px solid rgba(255,159,28,0.25);
  letter-spacing:.5px;
}
/* ===== Header ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(11,15,26,0.78);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border-soft);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  gap:20px;
}
.brand{
  font-size:21px;
  font-weight:800;
  letter-spacing:1px;
  color:var(--text-main);
  white-space:nowrap;
  display:flex;
  align-items:center;
  gap:10px;
}
.brand-icon{
  width:10px;
  height:28px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--primary-dark));
  display:inline-block;
  box-shadow:0 0 14px rgba(255,159,28,0.5);
}
.site-nav{
  display:flex;
  align-items:center;
  gap:8px;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  padding:9px 18px;
  border-radius:999px;
  font-size:15px;
  font-weight:500;
  color:var(--text-muted);
  transition:all .3s;
  position:relative;
}
.nav-link:hover{
  color:var(--text-main);
  background:rgba(255,255,255,0.05);
}
.nav-link.active{
  color:var(--primary);
  background:rgba(255,159,28,0.1);
  font-weight:600;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  border-radius:10px;
  background:transparent;
  border:1px solid var(--border-soft);
  padding:10px;
}
.nav-toggle span{
  display:block;
  height:2px;
  width:100%;
  background:var(--text-main);
  border-radius:2px;
  transition:all .3s;
}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:88vh;
  display:flex;
  align-items:center;
  padding:80px 0 60px;
  overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(11,15,26,0.96) 0%,rgba(11,15,26,0.82) 40%,rgba(11,15,26,0.45) 100%);
  z-index:1;
}
.hero::after{
  content:"";
  position:absolute;
  bottom:0;
  left:0;
  right:0;
  height:120px;
  background:linear-gradient(180deg,transparent,var(--bg-page));
  z-index:2;
}
.hero-inner{
  position:relative;
  z-index:3;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:60px;
  align-items:center;
  width:100%;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 18px;
  border-radius:999px;
  background:rgba(0,212,255,0.1);
  border:1px solid rgba(0,212,255,0.3);
  color:var(--accent);
  font-size:13px;
  font-weight:700;
  letter-spacing:2px;
  margin-bottom:24px;
}
.hero-tag::before{
  content:"";
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 12px var(--accent);
  animation:pulse 2s infinite;
}
@keyframes pulse{
  0%,100%{opacity:1}
  50%{opacity:0.4}
}
.hero-content h1{
  font-size:52px;
  font-weight:900;
  line-height:1.2;
  letter-spacing:2px;
  margin-bottom:20px;
  background:linear-gradient(120deg,#ffffff 30%,#ffd08a 70%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-content .subline{
  font-size:18px;
  color:var(--text-muted);
  line-height:1.8;
  max-width:520px;
  margin-bottom:32px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:42px;
}
.hero-stats{
  display:flex;
  gap:40px;
  flex-wrap:wrap;
}
.hero-stats .stat-item strong{
  display:block;
  font-size:28px;
  font-weight:800;
  color:var(--text-main);
  line-height:1.2;
}
.hero-stats .stat-item span{
  font-size:14px;
  color:var(--text-muted);
}
.hero-panel{
  position:relative;
}
.panel-card{
  background:rgba(20,28,45,0.85);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  padding:28px;
  box-shadow:var(--shadow-lg);
}
.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:22px;
}
.panel-title{
  font-size:16px;
  font-weight:700;
  letter-spacing:1px;
  display:flex;
  align-items:center;
  gap:10px;
}
.panel-title::before{
  content:"";
  width:6px;
  height:18px;
  border-radius:2px;
  background:var(--primary);
}
.panel-status{
  font-size:12px;
  padding:4px 12px;
  border-radius:999px;
  background:rgba(0,212,255,0.12);
  color:var(--accent);
  border:1px solid rgba(0,212,255,0.2);
}
.panel-list{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:20px;
}
.panel-item{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px;
  border-radius:var(--radius-md);
  background:rgba(255,255,255,0.03);
  border:1px solid transparent;
  transition:all .3s;
}
.panel-item:hover{
  background:rgba(255,255,255,0.06);
  border-color:var(--border-strong);
  transform:translateX(4px);
}
.item-rank{
  font-size:20px;
  font-weight:800;
  color:var(--primary);
  background:rgba(255,159,28,0.1);
  width:42px;
  height:42px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  flex-shrink:0;
}
.item-info strong{
  display:block;
  font-size:15px;
  margin-bottom:2px;
}
.item-info span{
  font-size:13px;
  color:var(--text-muted);
}
.panel-link{
  display:block;
  text-align:center;
  padding:11px;
  border-radius:10px;
  background:rgba(255,159,28,0.1);
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  transition:all .3s;
}
.panel-link:hover{
  background:rgba(255,159,28,0.2);
}
/* ===== Feature ===== */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.feature-card{
  background:var(--bg-card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  padding:36px 30px;
  transition:all .3s;
  position:relative;
  overflow:hidden;
}
.feature-card:hover{
  background:var(--bg-card-hover);
  transform:translateY(-6px);
  box-shadow:var(--shadow-md);
  border-color:rgba(255,159,28,0.2);
}
.feature-icon{
  width:54px;
  height:54px;
  border-radius:14px;
  background:rgba(255,159,28,0.12);
  border:1px solid rgba(255,159,28,0.2);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  margin-bottom:20px;
}
.feature-card h3{
  font-size:19px;
  font-weight:700;
  margin-bottom:10px;
  letter-spacing:.5px;
}
.feature-card p{
  color:var(--text-muted);
  font-size:14px;
  line-height:1.7;
}
/* ===== Category ===== */
.category-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.category-card{
  background:var(--bg-card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:all .3s;
  display:flex;
  flex-direction:column;
}
.category-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-md);
  border-color:rgba(0,212,255,0.25);
}
.category-card .cover{
  position:relative;
  height:190px;
  overflow:hidden;
}
.category-card .cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.category-card:hover .cover img{
  transform:scale(1.05);
}
.category-card .cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(11,15,26,0.85));
}
.category-card .cover .badge{
  position:absolute;
  top:16px;
  left:16px;
  z-index:2;
}
.category-body{
  padding:24px 24px 28px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.category-body h3{
  font-size:19px;
  font-weight:700;
  margin-bottom:10px;
}
.category-body p{
  color:var(--text-muted);
  font-size:14px;
  line-height:1.7;
  flex:1;
  margin-bottom:18px;
}
.category-more{
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:gap .3s;
}
.category-more:hover{
  gap:12px;
}
/* ===== News ===== */
.news-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.news-card{
  background:var(--bg-card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-md);
  transition:all .3s;
}
.news-card:hover{
  background:var(--bg-card-hover);
  border-color:rgba(255,159,28,0.25);
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
}
.news-card a{
  display:block;
  padding:26px 28px;
  height:100%;
}
.news-meta{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:14px;
  gap:12px;
  flex-wrap:wrap;
}
.news-date{
  font-size:13px;
  color:var(--text-weak);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.news-date::before{
  content:"";
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--text-weak);
  display:inline-block;
}
.news-card h3{
  font-size:18px;
  font-weight:700;
  line-height:1.5;
  margin-bottom:10px;
  transition:color .3s;
}
.news-card:hover h3{
  color:var(--primary);
}
.news-excerpt{
  color:var(--text-muted);
  font-size:14px;
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:18px;
}
.news-more{
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:gap .3s;
}
.news-card:hover .news-more{
  gap:10px;
}
.empty-tip{
  grid-column:1/-1;
  text-align:center;
  padding:60px 20px;
  color:var(--text-muted);
  font-size:16px;
  background:var(--bg-card);
  border-radius:var(--radius-md);
  border:1px dashed var(--border-strong);
}
/* ===== Stats ===== */
.stats-section{
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  position:relative;
}
.stats-section::before{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(11,15,26,0.88);
}
.stats-section .container{
  position:relative;
  z-index:2;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.stat-block{
  text-align:center;
  padding:38px 20px;
  background:rgba(20,28,45,0.7);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  backdrop-filter:blur(10px);
  transition:all .3s;
}
.stat-block:hover{
  border-color:rgba(255,159,28,0.35);
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
}
.stat-block strong{
  display:block;
  font-size:42px;
  font-weight:900;
  color:var(--primary);
  line-height:1.2;
  margin-bottom:6px;
}
.stat-block span{
  font-size:15px;
  color:var(--text-muted);
}
/* ===== Steps ===== */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  counter-reset:step;
}
.step-card{
  background:var(--bg-card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  padding:32px 24px;
  text-align:center;
  position:relative;
  transition:all .3s;
}
.step-card:hover{
  transform:translateY(-6px);
  border-color:rgba(0,212,255,0.25);
  box-shadow:var(--shadow-md);
}
.step-num{
  width:50px;
  height:50px;
  margin:0 auto 18px;
  border-radius:50%;
  background:rgba(0,212,255,0.12);
  border:1px solid rgba(0,212,255,0.25);
  color:var(--accent);
  font-size:20px;
  font-weight:800;
  display:flex;
  align-items:center;
  justify-content:center;
}
.step-card h3{
  font-size:17px;
  font-weight:700;
  margin-bottom:10px;
}
.step-card p{
  color:var(--text-muted);
  font-size:14px;
  line-height:1.7;
}
.steps-grid .step-card::after{
  content:"→";
  position:absolute;
  right:-18px;
  top:50%;
  transform:translateY(-50%);
  color:var(--text-weak);
  font-size:22px;
  z-index:2;
}
.steps-grid .step-card:last-child::after{
  display:none;
}
/* ===== FAQ ===== */
.faq-list{
  max-width:820px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.faq-item{
  background:var(--bg-card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:all .3s;
}
.faq-item:hover{
  border-color:var(--border-strong);
}
.faq-item details summary{
  cursor:pointer;
  padding:22px 26px;
  font-size:16px;
  font-weight:600;
  color:var(--text-main);
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  transition:color .3s;
  user-select:none;
}
.faq-item details summary::-webkit-details-marker{
  display:none;
}
.faq-item details summary::after{
  content:"+";
  font-size:24px;
  font-weight:400;
  color:var(--primary);
  transition:transform .3s;
  flex-shrink:0;
}
.faq-item details[open] summary::after{
  transform:rotate(45deg);
}
.faq-item details[open] summary{
  color:var(--primary);
  border-bottom:1px solid var(--border-soft);
}
.faq-answer{
  padding:20px 26px;
  color:var(--text-muted);
  font-size:15px;
  line-height:1.8;
  background:rgba(255,255,255,0.02);
}
.faq-answer p{
  margin-bottom:8px;
}
.faq-answer p:last-child{
  margin-bottom:0;
}
/* ===== CTA ===== */
.cta-box{
  background:linear-gradient(135deg,rgba(255,159,28,0.15),rgba(0,212,255,0.08)),var(--bg-card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  padding:60px 40px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-box::before{
  content:"";
  position:absolute;
  top:-40px;
  right:-40px;
  width:160px;
  height:160px;
  border-radius:50%;
  background:rgba(255,159,28,0.12);
  filter:blur(40px);
}
.cta-box::after{
  content:"";
  position:absolute;
  bottom:-60px;
  left:-60px;
  width:200px;
  height:200px;
  border-radius:50%;
  background:rgba(0,212,255,0.1);
  filter:blur(50px);
}
.cta-box > *{
  position:relative;
  z-index:2;
}
.cta-box h2{
  font-size:34px;
  font-weight:800;
  margin-bottom:14px;
}
.cta-box p{
  color:var(--text-muted);
  font-size:16px;
  margin-bottom:30px;
  max-width:560px;
  margin-left:auto;
  margin-right:auto;
}
.cta-actions{
  display:flex;
  gap:14px;
  justify-content:center;
  flex-wrap:wrap;
}
/* ===== Footer ===== */
.site-footer{
  background:#070b12;
  border-top:1px solid var(--border-soft);
  padding:56px 0 30px;
}
.footer-inner{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:flex-start;
  gap:30px;
  margin-bottom:36px;
}
.footer-brand{
  max-width:320px;
}
.footer-brand .brand{
  margin-bottom:14px;
}
.footer-brand p{
  color:var(--text-muted);
  font-size:14px;
  line-height:1.7;
}
.footer-links{
  display:flex;
  gap:40px;
  flex-wrap:wrap;
}
.footer-links-col strong{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:14px;
}
.footer-links-col a{
  display:block;
  padding:5px 0;
  color:var(--text-muted);
  font-size:14px;
  transition:color .3s;
}
.footer-links-col a:hover{
  color:var(--primary);
}
.footer-bottom{
  border-top:1px solid var(--border-soft);
  padding-top:22px;
  text-align:center;
  color:var(--text-weak);
  font-size:13px;
}
/* ===== Responsive ===== */
@media (max-width:1024px){
  :root{
    --space-section:70px;
  }
  .hero-inner{
    grid-template-columns:1fr;
    gap:40px;
  }
  .hero-content h1{
    font-size:42px;
  }
  .hero-panel{
    max-width:560px;
  }
  .feature-grid,.category-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .stats-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .steps-grid{
    grid-template-columns:repeat(2,1fr);
    gap:20px;
  }
  .steps-grid .step-card::after{
    display:none;
  }
}
@media (max-width:768px){
  .nav-toggle{
    display:flex;
  }
  .site-nav{
    position:fixed;
    top:0;
    right:-100%;
    width:280px;
    height:100vh;
    background:rgba(13,18,32,0.98);
    flex-direction:column;
    align-items:flex-start;
    padding:100px 30px 40px;
    gap:6px;
    transition:right .35s ease;
    z-index:999;
    border-left:1px solid var(--border-soft);
    box-shadow:var(--shadow-lg);
  }
  .site-nav.open{
    right:0;
  }
  .site-nav .nav-link{
    width:100%;
    padding:12px 18px;
    font-size:16px;
  }
  .site-header{
    background:rgba(11,15,26,0.92);
  }
  .hero{
    min-height:auto;
    padding-top:60px;
  }
  .hero-content h1{
    font-size:34px;
  }
  .hero-content .subline{
    font-size:16px;
  }
  .hero-actions{
    flex-direction:column;
    align-items:stretch;
  }
  .hero-actions .btn{
    justify-content:center;
  }
  .hero-stats{
    gap:24px;
  }
  .feature-grid,.category-grid,.news-grid{
    grid-template-columns:1fr;
  }
  .section-header h2{
    font-size:28px;
  }
  .cta-box{
    padding:44px 24px;
  }
  .cta-box h2{
    font-size:26px;
  }
}
@media (max-width:520px){
  .container{
    padding:0 18px;
  }
  .brand{
    font-size:18px;
  }
  .section-header h2{
    font-size:24px;
  }
  .stats-grid{
    grid-template-columns:1fr;
  }
  .steps-grid{
    grid-template-columns:1fr;
  }
  .hero-content h1{
    font-size:28px;
  }
  .hero-stats{
    flex-direction:column;
    gap:14px;
  }
  .footer-inner{
    flex-direction:column;
  }
}

/* roulang page: category1 */
:root {
        --primary: #f6c242;
        --primary-dark: #d9a620;
        --primary-glow: rgba(246, 194, 66, 0.3);
        --accent: #ff6a3d;
        --bg-deep: #0c0a14;
        --bg-main: #121020;
        --bg-card: #191530;
        --bg-card-hover: #1e1840;
        --bg-soft: #221c3e;
        --text-main: #f2eef8;
        --text-weak: #8f88a8;
        --border: rgba(255, 255, 255, 0.08);
        --border-strong: rgba(246, 194, 66, 0.25);
        --radius-lg: 18px;
        --radius-md: 14px;
        --radius-sm: 10px;
        --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
        --shadow-hover: 0 10px 40px rgba(0, 0, 0, 0.45);
    }

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

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
    }

    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
        background: var(--bg-main);
        color: var(--text-main);
        line-height: 1.7;
        font-size: 15px;
        overflow-x: hidden;
    }

    a {
        text-decoration: none;
        color: inherit;
        transition: color 0.3s ease;
    }

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

    button {
        font-family: inherit;
        border: none;
        background: none;
        cursor: pointer;
    }

    input {
        font-family: inherit;
    }

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

    /* ========== HEADER ========== */
    .site-header {
        background: var(--bg-deep);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 100;
        backdrop-filter: blur(12px);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 72px;
        gap: 24px;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 800;
        letter-spacing: 0.5px;
        color: var(--text-main);
        flex-shrink: 0;
    }

    .brand-icon {
        width: 34px;
        height: 34px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        display: inline-block;
        position: relative;
        box-shadow: 0 0 14px var(--primary-glow);
        flex-shrink: 0;
    }

    .brand-icon::after {
        content: "";
        position: absolute;
        inset: 8px;
        border-radius: 5px;
        background: var(--bg-deep);
        clip-path: polygon(30% 20%, 75% 20%, 50% 80%, 25% 80%);
    }

    .site-nav {
        display: flex;
        align-items: center;
        gap: 6px;
        margin: 0 auto;
    }

    .nav-link {
        display: inline-block;
        padding: 8px 16px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        color: var(--text-weak);
        transition: all 0.3s ease;
        letter-spacing: 0.3px;
        white-space: nowrap;
    }

    .nav-link:hover {
        color: var(--primary);
        background: rgba(246, 194, 66, 0.08);
    }

    .nav-link.active {
        color: var(--bg-deep);
        background: var(--primary);
        box-shadow: 0 4px 16px var(--primary-glow);
    }

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

    .nav-toggle {
        display: none;
        width: 40px;
        height: 40px;
        border-radius: 10px;
        background: var(--bg-soft);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        transition: background 0.3s ease;
    }

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

    /* ========== PAGE BANNER ========== */
    .page-banner {
        position: relative;
        padding: 120px 0 90px;
        background: linear-gradient(135deg, #0b0915 0%, #1a1533 55%, #241d42 100%);
        overflow: hidden;
    }

    .page-banner::before {
        content: "";
        position: absolute;
        top: -60%;
        right: -20%;
        width: 600px;
        height: 600px;
        background: radial-gradient(circle, rgba(246, 194, 66, 0.14) 0%, transparent 70%);
        pointer-events: none;
    }

    .page-banner::after {
        content: "";
        position: absolute;
        bottom: -100%;
        left: -15%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(255, 106, 61, 0.1) 0%, transparent 70%);
        pointer-events: none;
    }

    .banner-inner {
        position: relative;
        z-index: 2;
        max-width: 800px;
    }

    .banner-badge {
        display: inline-block;
        padding: 6px 14px;
        border-radius: 999px;
        background: rgba(246, 194, 66, 0.12);
        border: 1px solid var(--border-strong);
        color: var(--primary);
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 1px;
        margin-bottom: 20px;
        text-transform: uppercase;
    }

    .page-banner h1 {
        font-size: 42px;
        font-weight: 900;
        line-height: 1.25;
        margin-bottom: 16px;
        letter-spacing: 1px;
    }

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

    .page-banner p {
        font-size: 17px;
        color: var(--text-weak);
        line-height: 1.8;
        max-width: 640px;
    }

    .banner-meta {
        display: flex;
        align-items: center;
        gap: 20px;
        margin-top: 28px;
        flex-wrap: wrap;
    }

    .banner-meta-item {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-weak);
    }

    .banner-meta-item i {
        color: var(--primary);
        font-size: 15px;
    }

    /* ========== SECTION GENERAL ========== */
    .section {
        padding: 80px 0;
    }

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

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

    .section-head .left {
        max-width: 620px;
    }

    .section-label {
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 2px;
        text-transform: uppercase;
        color: var(--primary);
        margin-bottom: 8px;
        display: block;
    }

    .section-head h2 {
        font-size: 30px;
        font-weight: 800;
        line-height: 1.3;
        letter-spacing: 0.5px;
    }

    .section-head p {
        color: var(--text-weak);
        font-size: 15px;
        margin-top: 10px;
        line-height: 1.7;
    }

    .section-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: var(--primary);
        font-size: 14px;
        font-weight: 600;
        padding: 8px 16px;
        border-radius: 999px;
        border: 1px solid var(--border-strong);
        transition: all 0.3s ease;
        flex-shrink: 0;
    }

    .section-link:hover {
        background: rgba(246, 194, 66, 0.1);
        transform: translateX(4px);
    }

    /* ========== SUB CATEGORY CARDS ========== */
    .subcat-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .subcat-card {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border);
        background: var(--bg-card);
        min-height: 200px;
        display: flex;
        align-items: flex-end;
        padding: 28px;
        transition: all 0.4s ease;
    }

    .subcat-card::before {
        content: "";
        position: absolute;
        inset: 0;
        background-size: cover;
        background-position: center;
        opacity: 0.35;
        transition: opacity 0.4s ease, transform 0.6s ease;
        z-index: 0;
    }

    .subcat-card:nth-child(1)::before {
        background-image: url("/assets/images/coverpic/cover-1.png");
    }

    .subcat-card:nth-child(2)::before {
        background-image: url("/assets/images/coverpic/cover-2.png");
    }

    .subcat-card:nth-child(3)::before {
        background-image: url("/assets/images/coverpic/cover-3.png");
    }

    .subcat-card::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 20%, rgba(12, 10, 20, 0.85) 70%);
        z-index: 1;
    }

    .subcat-card:hover::before {
        opacity: 0.55;
        transform: scale(1.03);
    }

    .subcat-card:hover {
        border-color: var(--border-strong);
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
    }

    .subcat-card .content {
        position: relative;
        z-index: 2;
    }

    .subcat-card .icon-wrap {
        width: 42px;
        height: 42px;
        border-radius: 12px;
        background: rgba(246, 194, 66, 0.15);
        border: 1px solid var(--border-strong);
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 14px;
    }

    .subcat-card .icon-wrap i {
        font-size: 18px;
        color: var(--primary);
    }

    .subcat-card h3 {
        font-size: 19px;
        font-weight: 700;
        margin-bottom: 6px;
        letter-spacing: 0.3px;
    }

    .subcat-card p {
        font-size: 13.5px;
        color: var(--text-weak);
        line-height: 1.6;
    }

    /* ========== FEATURED CONTENT LIST ========== */
    .guide-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .guide-item {
        display: flex;
        align-items: center;
        gap: 20px;
        padding: 20px 24px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--border);
        transition: all 0.35s ease;
    }

    .guide-item:hover {
        border-color: var(--border-strong);
        background: var(--bg-card-hover);
        transform: translateX(6px);
        box-shadow: var(--shadow-card);
    }

    .guide-item .num {
        font-size: 26px;
        font-weight: 900;
        color: var(--primary);
        opacity: 0.7;
        font-style: italic;
        width: 48px;
        text-align: center;
        flex-shrink: 0;
    }

    .guide-item .info {
        flex: 1;
        min-width: 0;
    }

    .guide-item .info h3 {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 4px;
        letter-spacing: 0.2px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .guide-item .info p {
        font-size: 13.5px;
        color: var(--text-weak);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .guide-tags {
        display: flex;
        gap: 8px;
        flex-shrink: 0;
    }

    .tag {
        display: inline-block;
        padding: 4px 12px;
        border-radius: 6px;
        font-size: 12px;
        font-weight: 600;
        background: rgba(246, 194, 66, 0.1);
        color: var(--primary);
        border: 1px solid var(--border-strong);
        white-space: nowrap;
    }

    .tag.blue {
        background: rgba(80, 160, 255, 0.1);
        color: #5aa2ff;
        border-color: rgba(80, 160, 255, 0.25);
    }

    .tag.purple {
        background: rgba(180, 110, 255, 0.1);
        color: #b47aff;
        border-color: rgba(180, 110, 255, 0.25);
    }

    .guide-item .arrow {
        flex-shrink: 0;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--bg-soft);
        color: var(--text-weak);
        font-size: 14px;
        transition: all 0.3s ease;
    }

    .guide-item:hover .arrow {
        background: var(--primary);
        color: var(--bg-deep);
    }

    /* ========== STATS / DATA ========== */
    .stats-panel {
        background: linear-gradient(135deg, #191430, #221b3e);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 48px;
        position: relative;
        overflow: hidden;
    }

    .stats-panel::before {
        content: "";
        position: absolute;
        top: -80px;
        right: -80px;
        width: 260px;
        height: 260px;
        background: radial-gradient(circle, rgba(246, 194, 66, 0.15), transparent 70%);
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
        position: relative;
        z-index: 2;
    }

    .stat-item {
        text-align: center;
    }

    .stat-item .stat-value {
        font-size: 40px;
        font-weight: 900;
        color: var(--primary);
        letter-spacing: 1px;
        line-height: 1.2;
    }

    .stat-item .stat-label {
        font-size: 14px;
        color: var(--text-weak);
        margin-top: 8px;
    }

    .stats-note {
        text-align: center;
        margin-top: 32px;
        padding-top: 28px;
        border-top: 1px solid var(--border);
        color: var(--text-weak);
        font-size: 13.5px;
        position: relative;
        z-index: 2;
    }

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

    .path-step {
        border-radius: var(--radius-md);
        background: var(--bg-card);
        border: 1px solid var(--border);
        padding: 24px;
        position: relative;
        transition: all 0.35s ease;
    }

    .path-step:hover {
        border-color: var(--border-strong);
        transform: translateY(-4px);
        box-shadow: var(--shadow-card);
    }

    .path-step .step-num {
        font-size: 13px;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: 1px;
        margin-bottom: 10px;
        display: block;
    }

    .path-step h3 {
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 8px;
    }

    .path-step p {
        font-size: 13.5px;
        color: var(--text-weak);
        line-height: 1.6;
    }

    .path-step::after {
        content: "→";
        position: absolute;
        right: -18px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--primary);
        font-size: 18px;
        font-weight: 700;
        z-index: 2;
    }

    .path-step:last-child::after {
        display: none;
    }

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

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

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

    .faq-item summary {
        cursor: pointer;
        padding: 20px 24px;
        font-size: 15.5px;
        font-weight: 600;
        list-style: none;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        transition: all 0.3s ease;
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary::after {
        content: "+";
        font-size: 22px;
        font-weight: 400;
        color: var(--primary);
        flex-shrink: 0;
        transition: transform 0.3s ease;
    }

    .faq-item[open] summary::after {
        transform: rotate(45deg);
    }

    .faq-item .faq-body {
        padding: 0 24px 20px;
        color: var(--text-weak);
        font-size: 14px;
        line-height: 1.75;
    }

    /* ========== CTA ========== */
    .cta-section {
        position: relative;
        background: linear-gradient(135deg, #1a1533 0%, #251c44 60%, #2d234f 100%);
        padding: 70px 0;
        overflow: hidden;
    }

    .cta-section::before {
        content: "";
        position: absolute;
        top: -100px;
        left: 50%;
        transform: translateX(-50%);
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(246, 194, 66, 0.12), transparent 65%);
        pointer-events: none;
    }

    .cta-inner {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 700px;
        margin: 0 auto;
    }

    .cta-inner h2 {
        font-size: 30px;
        font-weight: 800;
        margin-bottom: 12px;
    }

    .cta-inner p {
        color: var(--text-weak);
        font-size: 15.5px;
        margin-bottom: 32px;
    }

    .cta-btn-group {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 999px;
        font-size: 15px;
        font-weight: 700;
        letter-spacing: 0.3px;
        border: 1px solid transparent;
        transition: all 0.3s ease;
        cursor: pointer;
    }

    .btn-primary {
        background: var(--primary);
        color: var(--bg-deep);
        box-shadow: 0 4px 20px var(--primary-glow);
    }

    .btn-primary:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 30px var(--primary-glow);
    }

    .btn-outline {
        border-color: var(--border-strong);
        color: var(--primary);
    }

    .btn-outline:hover {
        background: rgba(246, 194, 66, 0.08);
        transform: translateY(-2px);
    }

    /* ========== FOOTER ========== */
    .site-footer {
        background: var(--bg-deep);
        border-top: 1px solid var(--border);
        padding: 56px 0 0;
    }

    .footer-inner {
        display: flex;
        justify-content: space-between;
        gap: 48px;
        flex-wrap: wrap;
        padding-bottom: 40px;
    }

    .footer-brand {
        max-width: 320px;
    }

    .footer-brand p {
        color: var(--text-weak);
        font-size: 14px;
        margin-top: 14px;
        line-height: 1.7;
    }

    .footer-links {
        display: flex;
        gap: 60px;
        flex-wrap: wrap;
    }

    .footer-links-col {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .footer-links-col strong {
        font-size: 14px;
        font-weight: 700;
        margin-bottom: 6px;
        letter-spacing: 0.5px;
        color: var(--text-main);
    }

    .footer-links-col a {
        font-size: 14px;
        color: var(--text-weak);
        transition: color 0.3s ease;
    }

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

    .footer-bottom {
        border-top: 1px solid var(--border);
        padding: 20px 0;
        text-align: center;
        font-size: 13px;
        color: var(--text-weak);
    }

    /* ========== RESPONSIVE ========== */
    @media (max-width: 1024px) {
        .page-banner {
            padding: 90px 0 70px;
        }

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

        .path-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .path-step::after {
            display: none;
        }

        .stats-grid {
            gap: 24px;
        }
    }

    @media (max-width: 768px) {
        .site-nav {
            display: none;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            background: var(--bg-deep);
            flex-direction: column;
            padding: 16px 24px;
            border-bottom: 1px solid var(--border);
            gap: 10px;
            margin: 0;
        }

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

        .nav-link {
            width: 100%;
            text-align: center;
            padding: 12px 16px;
        }

        .nav-toggle {
            display: flex;
        }

        .page-banner h1 {
            font-size: 30px;
        }

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

        .section {
            padding: 60px 0;
        }

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

        .guide-item {
            flex-wrap: wrap;
            padding: 16px;
        }

        .guide-item .info p {
            -webkit-line-clamp: 3;
        }

        .guide-tags {
            flex-wrap: wrap;
        }

        .stats-panel {
            padding: 32px 24px;
        }

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

        .footer-inner {
            flex-direction: column;
            gap: 32px;
        }
    }

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

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

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

        .page-banner h1 {
            font-size: 26px;
        }

        .banner-meta {
            gap: 12px;
        }

        .cta-btn-group .btn {
            width: 100%;
            justify-content: center;
        }

        .footer-links {
            gap: 32px;
        }
    }

    @media (min-width: 769px) {
        .site-nav {
            display: flex !important;
        }

        .nav-toggle {
            display: none;
        }
    }

/* roulang page: article */
:root {
  --primary: #0b1524;
  --primary-light: #131f35;
  --primary-dark: #070d18;
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --accent-soft: rgba(245, 158, 11, 0.12);
  --bg: #0a101c;
  --bg-card: #101b2f;
  --bg-elevated: #16233c;
  --text: #e9eef5;
  --text-secondary: #93a4bc;
  --text-muted: #64748b;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
  --transition: all 0.24s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-xxl: 5rem;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 24, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
}
.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #f97316);
  box-shadow: 0 0 18px rgba(245, 158, 11, 0.35);
  flex-shrink: 0;
  position: relative;
}
.brand-icon::after {
  content: '';
  position: absolute;
  inset: 8px 5px;
  background: var(--primary);
  border-radius: 4px;
  transform: skewX(-12deg);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  border: 1px solid transparent;
}
.nav-link:hover {
  color: var(--text);
  background: var(--bg-elevated);
  border-color: var(--border);
}
.nav-link.active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: rgba(245, 158, 11, 0.3);
  font-weight: 700;
}
.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle:hover { background: var(--bg-elevated); }
.nav-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  padding: 4.5rem 0 3rem;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 13, 24, 0.82) 0%, rgba(10, 16, 28, 0.94) 100%);
  z-index: 0;
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: var(--transition);
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }
.breadcrumb .current { color: var(--accent); }
.cat-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.85rem;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(245, 158, 11, 0.3);
  margin-bottom: 1rem;
}
.page-hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  line-height: 1.35;
  font-weight: 800;
  max-width: 780px;
  margin-bottom: 1.2rem;
  letter-spacing: -0.01em;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.2rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}
.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.article-meta .meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

/* ========== Article Body ========== */
.article-main {
  padding: var(--space-xl) 0;
}
.article-layout {
  max-width: 900px;
  margin: 0 auto;
}
.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.article-cover img {
  width: 100%;
  height: auto;
  object-fit: cover;
}
.article-content {
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.85;
}
.article-content h2 {
  font-size: 1.55rem;
  font-weight: 800;
  margin: 2.4rem 0 1rem;
  color: var(--text);
  position: relative;
  padding-left: 0.9rem;
}
.article-content h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.2em;
  bottom: 0.2em;
  width: 4px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), #f97316);
}
.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1.8rem 0 0.8rem;
  color: var(--text);
}
.article-content p {
  margin-bottom: 1.4rem;
  color: var(--text-secondary);
}
.article-content strong { color: var(--text); font-weight: 700; }
.article-content ul, .article-content ol {
  margin: 0 0 1.5rem 1.2rem;
  color: var(--text-secondary);
}
.article-content ul li, .article-content ol li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--bg-card);
  padding: 1.2rem 1.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.8rem 0;
  color: var(--text);
  font-style: italic;
}
.article-content img {
  border-radius: var(--radius);
  margin: 1.8rem 0;
  border: 1px solid var(--border);
}
.article-content a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.article-content a:hover { border-color: var(--accent); }

/* Not found */
.not-found-box {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 640px;
  margin: 0 auto;
}
.not-found-box .nf-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  display: inline-block;
}
.not-found-box h2 {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.not-found-box p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  border-radius: 99px;
  background: linear-gradient(135deg, var(--accent), #f97316);
  color: #0b1524;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid rgba(245, 158, 11, 0.5);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.25);
  transition: var(--transition);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.35);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.8rem;
  border-radius: 99px;
  background: transparent;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border-strong);
  transition: var(--transition);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.btn-outline:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ========== Section common ========== */
.section-head {
  text-align: center;
  margin-bottom: var(--space-lg);
}
.section-head .subtitle {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.section-head h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.section-head p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 0.95rem;
}

/* ========== Feature cards ========== */
.feature-cards {
  padding: var(--space-xxl) 0;
  background: var(--primary-dark);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.info-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}
.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--border-strong);
}
.info-card:hover::after { opacity: 1; }
.info-card .info-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1.1rem;
}
.info-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.info-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Related section ========== */
.related-section {
  padding: var(--space-xxl) 0;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}
.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(245, 158, 11, 0.3);
}
.related-cover {
  height: 170px;
  overflow: hidden;
  position: relative;
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.related-card:hover .related-cover img {
  transform: scale(1.05);
}
.related-cover .related-cat-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(7, 13, 24, 0.8);
  backdrop-filter: blur(8px);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.7rem;
  border-radius: 99px;
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.related-info {
  padding: 1.4rem 1.4rem 1.6rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.related-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 0.6rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-info .related-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: auto;
}
.related-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 2rem;
  background: var(--bg-card);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-secondary);
}

/* ========== FAQ ========== */
.faq-section {
  padding: var(--space-xxl) 0;
  background: var(--primary-dark);
  border-top: 1px solid var(--border);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-question {
  padding: 1.3rem 1.5rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  transition: var(--transition);
}
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 1.5rem 1.3rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  display: none;
}

/* ========== CTA ========== */
.cta-section {
  padding: var(--space-xxl) 0;
  position: relative;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 13, 24, 0.88) 0%, rgba(10, 16, 28, 0.92) 100%);
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 0;
}
.cta-inner h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.cta-inner p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 2rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--primary-dark);
  border-top: 1px solid var(--border);
  padding: 3.5rem 0 2rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}
.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-top: 0.8rem;
  max-width: 420px;
  line-height: 1.7;
}
.footer-links {
  display: flex;
  gap: 3rem;
  justify-content: flex-end;
}
.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.footer-links-col strong {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}
.footer-links-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
  width: fit-content;
}
.footer-links-col a:hover {
  color: var(--accent);
  transform: translateX(3px);
}
.footer-bottom {
  color: var(--text-muted);
  font-size: 0.85rem;
  padding-top: 1.5rem;
  text-align: center;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .header-inner { height: 60px; }
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    top: 60px;
    right: 0;
    width: 100%;
    background: rgba(7, 13, 24, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    padding: 1.2rem;
    gap: 0.4rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 99;
    box-shadow: var(--shadow);
  }
  .site-nav.open {
    transform: translateY(0);
  }
  .nav-link {
    padding: 0.85rem 1.2rem;
    border-radius: 10px;
    font-size: 1rem;
  }
  .page-hero { padding: 3rem 0 2rem; }
  .page-hero h1 { font-size: 1.5rem; }
  .info-grid { grid-template-columns: 1fr; padding: 0 1rem; }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-links { justify-content: flex-start; gap: 2.5rem; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; max-width: 320px; }
  .article-content { font-size: 1rem; }
  .article-cover { margin-bottom: 1.8rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 1rem; }
  .brand { font-size: 1.05rem; }
  .brand-icon { width: 28px; height: 28px; }
  .info-grid { grid-template-columns: 1fr; }
}