/* roulang page: index */
:root{
  --font-sans:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --primary:#2F6FF2;
  --primary-dark:#2053C4;
  --primary-soft:#EBF2FF;
  --accent:#F5B942;
  --accent-dark:#D99A1F;
  --ink-900:#0E1B2C;
  --ink-700:#2A3A4E;
  --ink-600:#475467;
  --ink-400:#8494A6;
  --bg:#F6F8FB;
  --bg-white:#FFFFFF;
  --border:#E4E7EC;
  --radius-lg:22px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(16,24,40,.06);
  --shadow-md:0 14px 36px rgba(16,24,40,.08);
  --shadow-lg:0 26px 64px rgba(16,24,40,.12);
  --space-section:92px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--ink-900);
  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;border:none;background:none}
input,textarea,select{font-family:inherit}
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:3px solid rgba(47,111,242,.35);
  outline-offset:2px;
  border-radius:8px;
}
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--space-section) 0}
.section-head{
  text-align:center;
  max-width:680px;
  margin:0 auto 52px;
}
.section-tag{
  display:inline-block;
  background:var(--primary-soft);
  color:var(--primary);
  border-radius:999px;
  padding:7px 18px;
  font-weight:600;
  font-size:14px;
  letter-spacing:.02em;
}
.section-head h2{
  font-size:36px;
  line-height:1.3;
  margin:18px 0 12px;
  color:var(--ink-900);
  font-weight:700;
}
.section-head p{
  color:var(--ink-600);
  font-size:17px;
  margin:0;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 30px;
  border-radius:999px;
  font-weight:600;
  font-size:16px;
  line-height:1.4;
  border:1.5px solid transparent;
  transition:all .25s ease;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
  box-shadow:0 8px 22px rgba(47,111,242,.28);
}
.btn-primary:hover{
  background:var(--primary-dark);
  transform:translateY(-2px);
  box-shadow:0 12px 30px rgba(47,111,242,.34);
}
.btn-primary:active{transform:translateY(0)}
.btn-outline{
  background:rgba(255,255,255,.08);
  color:#fff;
  border-color:rgba(255,255,255,.65);
  backdrop-filter:blur(4px);
}
.btn-outline:hover{
  background:rgba(255,255,255,.18);
  border-color:#fff;
  transform:translateY(-2px);
}
.btn-light{
  background:#fff;
  color:var(--ink-900);
  box-shadow:0 8px 22px rgba(0,0,0,.14);
}
.btn-light:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 30px rgba(0,0,0,.18);
}
.btn-outline-light{
  background:rgba(255,255,255,.08);
  color:#fff;
  border-color:rgba(255,255,255,.75);
}
.btn-outline-light:hover{
  background:rgba(255,255,255,.2);
  transform:translateY(-2px);
}
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
  box-shadow:var(--shadow-sm);
}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  min-height:76px;
  gap:16px;
}
.nav-left,.nav-right{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-left{justify-self:start}
.nav-right{justify-self:end}
.nav-link{
  display:inline-flex;
  align-items:center;
  padding:10px 20px;
  border-radius:999px;
  font-weight:500;
  font-size:15px;
  color:var(--ink-700);
  transition:all .22s ease;
}
.nav-link:hover{
  color:var(--primary);
  background:var(--primary-soft);
}
.nav-link.active{
  color:var(--primary);
  background:var(--primary-soft);
  font-weight:600;
}
.brand{
  justify-self:center;
  font-size:22px;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--ink-900);
  white-space:nowrap;
  padding:6px 10px;
  border-radius:12px;
  transition:opacity .2s;
}
.brand:hover{opacity:.82}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--border);
  background:#fff;
}
.nav-toggle span{
  display:block;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--ink-900);
  transition:all .25s ease;
}
.mobile-menu{
  display:none;
  flex-direction:column;
  padding:12px 24px 24px;
  background:#fff;
  border-top:1px solid var(--border);
}
.mobile-menu a{
  padding:14px 16px;
  border-radius:12px;
  font-size:16px;
  font-weight:500;
  color:var(--ink-700);
  transition:background .2s,color .2s;
}
.mobile-menu a:hover{
  background:var(--primary-soft);
  color:var(--primary);
}
.mobile-menu.is-open{display:flex}
.hero{
  position:relative;
  min-height:640px;
  display:flex;
  align-items:center;
  text-align:center;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  z-index:0;
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(8,18,35,.85),rgba(14,29,53,.72) 55%,rgba(26,47,82,.62));
  z-index:1;
}
.hero-content{
  position:relative;
  z-index:2;
  width:100%;
  padding:90px 0;
}
.hero-badge{
  display:inline-block;
  background:rgba(245,185,66,.16);
  color:var(--accent);
  border:1px solid rgba(245,185,66,.35);
  border-radius:999px;
  padding:8px 22px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:22px;
}
.hero-content h1{
  font-size:52px;
  line-height:1.2;
  color:#fff;
  font-weight:800;
  margin:0 0 20px;
  letter-spacing:.02em;
}
.hero-content p{
  font-size:18px;
  color:rgba(255,255,255,.85);
  max-width:640px;
  margin:0 auto 34px;
  line-height:1.8;
}
.hero-actions{
  display:flex;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:56px;
}
.hero-stats{
  display:flex;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}
.hero-stats div{
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(8px);
  border-radius:20px;
  padding:22px 34px;
  text-align:center;
  min-width:150px;
}
.hero-stats strong{
  display:block;
  font-size:28px;
  color:#fff;
  font-weight:700;
  line-height:1.3;
}
.hero-stats span{
  font-size:14px;
  color:rgba(255,255,255,.7);
}
.features{
  background:var(--bg-white);
}
.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:26px;
}
.feature-card{
  position:relative;
  background:var(--bg-white);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:38px 34px 34px;
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
  overflow:hidden;
}
.feature-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;
  transition:opacity .3s;
}
.feature-card:hover::before{opacity:1}
.feature-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-md);
}
.feature-card .feature-icon{
  width:52px;
  height:52px;
  border-radius:16px;
  background:var(--primary-soft);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  font-weight:700;
  margin-bottom:22px;
}
.feature-card h3{
  font-size:21px;
  margin:0 0 12px;
  color:var(--ink-900);
}
.feature-card p{
  color:var(--ink-600);
  font-size:15px;
  margin:0;
  line-height:1.7;
}
.categories{
  background:var(--bg);
}
.category-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.category-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .28s ease,box-shadow .28s ease;
  display:flex;
  flex-direction:column;
}
.category-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
}
.category-img{
  position:relative;
  height:214px;
  overflow:hidden;
}
.category-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.category-card:hover .category-img img{
  transform:scale(1.06);
}
.category-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(14,27,44,.18));
}
.category-body{
  padding:28px 28px 24px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.category-body h3{
  font-size:20px;
  margin:0 0 12px;
  color:var(--ink-900);
}
.category-body p{
  color:var(--ink-600);
  font-size:15px;
  line-height:1.7;
  margin:0 0 18px;
  flex:1;
}
.category-link{
  color:var(--primary);
  font-weight:600;
  font-size:15px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:gap .2s;
}
.category-link::after{
  content:"→";
  transition:transform .2s;
}
.category-card:hover .category-link::after{
  transform:translateX(4px);
}
.data-band{
  background:var(--ink-900);
  padding:66px 0;
  position:relative;
  overflow:hidden;
}
.data-band::before{
  content:"";
  position:absolute;
  width:420px;
  height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,111,242,.22),transparent 70%);
  top:-120px;
  right:-80px;
}
.data-band::after{
  content:"";
  position:absolute;
  width:340px;
  height:340px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(245,185,66,.16),transparent 70%);
  bottom:-130px;
  left:-60px;
}
.data-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.data-item{
  text-align:center;
  padding:26px 16px;
  border-radius:22px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  backdrop-filter:blur(6px);
  transition:background .3s,transform .3s;
}
.data-item:hover{
  background:rgba(255,255,255,.1);
  transform:translateY(-3px);
}
.data-item strong{
  font-size:44px;
  color:#fff;
  display:inline-block;
  line-height:1.1;
  font-weight:800;
}
.data-item em{
  font-style:normal;
  color:var(--accent);
  font-size:24px;
  font-weight:700;
  margin-left:2px;
}
.data-item span{
  display:block;
  color:rgba(255,255,255,.65);
  font-size:15px;
  margin-top:8px;
}
.news-section{
  background:var(--bg-white);
}
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:26px;
}
.news-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:30px 28px 24px;
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
  display:flex;
  flex-direction:column;
}
.news-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-md);
}
.news-badge{
  display:inline-block;
  align-self:flex-start;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:16px;
}
.news-card h3{
  font-size:18px;
  line-height:1.5;
  margin:0 0 12px;
  color:var(--ink-900);
}
.news-card h3 a{
  transition:color .2s;
}
.news-card h3 a:hover{
  color:var(--primary);
}
.news-card p{
  color:var(--ink-600);
  font-size:15px;
  line-height:1.7;
  margin:0 0 20px;
  flex:1;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-top:1px solid var(--border);
  padding-top:16px;
  margin-top:auto;
}
.news-meta time{
  color:var(--ink-400);
  font-size:13px;
}
.read-more{
  color:var(--primary);
  font-size:14px;
  font-weight:600;
}
.empty-tip{
  grid-column:1/-1;
  text-align:center;
  color:var(--ink-600);
  background:var(--bg);
  border-radius:var(--radius-lg);
  padding:60px 20px;
  font-size:17px;
}
.steps-section{
  background:var(--bg);
}
.steps-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:26px;
  position:relative;
}
.step-item{
  background:var(--bg-white);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:38px 32px;
  text-align:center;
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
  position:relative;
}
.step-item:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-md);
}
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:56px;
  height:56px;
  border-radius:18px;
  background:var(--primary);
  color:#fff;
  font-size:20px;
  font-weight:700;
  margin-bottom:20px;
  box-shadow:0 10px 24px rgba(47,111,242,.3);
}
.step-item h3{
  font-size:20px;
  margin:0 0 12px;
  color:var(--ink-900);
}
.step-item p{
  color:var(--ink-600);
  font-size:15px;
  line-height:1.7;
  margin:0;
}
.faq{
  background:var(--bg-white);
}
.faq-wrapper{
  display:grid;
  grid-template-columns:0.8fr 1.2fr;
  gap:60px;
  align-items:start;
}
.faq-left .section-tag{
  margin-bottom:16px;
}
.faq-left h2{
  font-size:34px;
  line-height:1.3;
  margin:14px 0 16px;
  color:var(--ink-900);
}
.faq-left p{
  color:var(--ink-600);
  font-size:16px;
  line-height:1.8;
  margin:0;
}
.faq-list{
  display:flex;
  flex-direction:column;
  gap:14px;
}
.faq-item{
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:16px;
  padding:8px 24px;
  transition:background .25s,border-color .25s;
}
.faq-item[open]{
  background:var(--bg-white);
  border-color:var(--primary);
  box-shadow:var(--shadow-sm);
}
.faq-item summary{
  cursor:pointer;
  list-style:none;
  padding:18px 32px 18px 0;
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  position:relative;
}
.faq-item summary::-webkit-details-marker{
  display:none;
}
.faq-item summary::before{
  content:"+";
  position:absolute;
  right:4px;
  top:50%;
  transform:translateY(-50%);
  width:28px;
  height:28px;
  border-radius:50%;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:18px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .25s,background .25s,color .25s;
}
.faq-item[open] summary::before{
  content:"−";
  background:var(--primary);
  color:#fff;
}
.faq-item p{
  color:var(--ink-600);
  font-size:15px;
  line-height:1.8;
  margin:0;
  padding:0 0 20px;
}
.cta{
  position:relative;
  padding:100px 0;
  overflow:hidden;
}
.cta-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  z-index:0;
}
.cta-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(8,18,35,.9),rgba(16,34,64,.74));
  z-index:1;
}
.cta-content{
  position:relative;
  z-index:2;
  text-align:center;
  max-width:640px;
}
.cta-content h2{
  font-size:38px;
  line-height:1.25;
  color:#fff;
  margin:0 0 18px;
}
.cta-content p{
  color:rgba(255,255,255,.82);
  font-size:17px;
  margin:0 0 34px;
  line-height:1.8;
}
.cta-actions{
  display:flex;
  gap:16px;
  justify-content:center;
  flex-wrap:wrap;
}
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.7);
}
.footer-inner{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:50px;
  padding:64px 24px 40px;
}
.footer-logo{
  display:inline-block;
  font-size:24px;
  font-weight:800;
  color:#fff;
  letter-spacing:.02em;
  margin-bottom:14px;
}
.footer-brand p{
  font-size:15px;
  line-height:1.8;
  max-width:280px;
  margin:0;
}
.footer-links h4,.footer-support h4{
  color:#fff;
  font-size:16px;
  font-weight:600;
  margin:0 0 18px;
}
.footer-links a{
  display:block;
  color:rgba(255,255,255,.65);
  padding:6px 0;
  font-size:15px;
  transition:color .2s,padding-left .2s;
}
.footer-links a:hover{
  color:var(--accent);
  padding-left:6px;
}
.footer-support p{
  font-size:15px;
  margin:0 0 8px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0;
}
.footer-bottom .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  font-size:14px;
  color:rgba(255,255,255,.45);
}
@media (max-width:1024px){
  :root{
    --space-section:70px;
  }
  .nav-left,.nav-right{
    display:none;
  }
  .nav-toggle{
    display:flex;
  }
  .header-inner{
    grid-template-columns:1fr auto 1fr;
  }
  .brand{
    font-size:19px;
  }
  .hero-content h1{
    font-size:40px;
  }
  .features-grid,
  .category-grid,
  .news-grid,
  .steps-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .data-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .faq-wrapper{
    grid-template-columns:1fr;
    gap:32px;
  }
}
@media (max-width:768px){
  :root{
    --space-section:56px;
  }
  .section-head h2{
    font-size:28px;
  }
  .hero{
    min-height:540px;
  }
  .hero-content{
    padding:60px 0;
  }
  .hero-content h1{
    font-size:32px;
  }
  .hero-content p{
    font-size:16px;
  }
  .hero-actions .btn{
    padding:11px 22px;
    font-size:15px;
  }
  .hero-stats div{
    padding:16px 22px;
    min-width:120px;
  }
  .hero-stats strong{
    font-size:22px;
  }
  .features-grid,
  .category-grid,
  .news-grid,
  .steps-grid,
  .data-grid{
    grid-template-columns:1fr;
  }
  .category-img{
    height:180px;
  }
  .footer-inner{
    grid-template-columns:1fr;
    gap:36px;
    padding:48px 24px 32px;
  }
}
@media (max-width:520px){
  .container{
    padding:0 16px;
  }
  .header-inner{
    min-height:64px;
    gap:8px;
  }
  .brand{
    font-size:17px;
    padding:4px 6px;
  }
  .nav-toggle{
    width:40px;
    height:40px;
  }
  .hero-content h1{
    font-size:26px;
  }
  .hero-content p{
    font-size:15px;
  }
  .hero-actions{
    flex-direction:column;
    align-items:center;
  }
  .hero-actions .btn{
    width:100%;
    max-width:260px;
  }
  .hero-stats{
    gap:10px;
  }
  .hero-stats div{
    min-width:96px;
    padding:14px 16px;
  }
  .section-head h2{
    font-size:24px;
  }
  .feature-card,
  .step-item{
    padding:28px 22px;
  }
  .news-card{
    padding:24px 20px;
  }
  .faq-item summary{
    font-size:15px;
    padding-right:38px;
  }
  .cta-content h2{
    font-size:26px;
  }
  .cta-actions{
    flex-direction:column;
    align-items:center;
  }
  .cta-actions .btn{
    width:100%;
  }
  .footer-bottom .container{
    flex-direction:column;
    text-align:center;
  }
}

/* roulang page: category1 */
:root{
  --primary:#0f2744;
  --primary-dark:#081829;
  --primary-light:#1c3d66;
  --accent:#d4a72c;
  --accent-light:#e8c65a;
  --bg:#f4f6fb;
  --bg-dark:#0d1f36;
  --card-bg:#ffffff;
  --text:#1c2b3a;
  --text-light:#5f6c80;
  --text-muted:#8a96a8;
  --border:#e3e9f0;
  --radius-sm:8px;
  --radius:14px;
  --radius-lg:24px;
  --shadow-sm:0 2px 8px rgba(15,39,68,0.06);
  --shadow:0 8px 28px rgba(15,39,68,0.08);
  --shadow-lg:0 16px 48px rgba(15,39,68,0.12);
  --container:1200px;
  --transition:all 0.3s ease;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;overflow-x:hidden;}
a{text-decoration:none;color:inherit;transition:var(--transition);}
img{max-width:100%;display:block;}
button,input,textarea{font:inherit;border:none;background:none;color:inherit;}
ul,ol{list-style:none;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-head{text-align:center;max-width:720px;margin:0 auto 52px;}
.section-tag{display:inline-block;background:rgba(212,167,44,0.12);color:var(--accent);font-size:0.85rem;font-weight:700;letter-spacing:1px;padding:6px 16px;border-radius:999px;margin-bottom:14px;}
.section-title{font-size:2rem;color:var(--primary);font-weight:800;line-height:1.3;margin-bottom:12px;}
.section-subtitle{color:var(--text-light);font-size:1.05rem;line-height:1.7;}
.text-accent{color:var(--accent);}

/* Header */
.site-header{
  background:rgba(255,255,255,0.95);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  position:sticky;top:0;z-index:100;
  border-bottom:1px solid var(--border);
  box-shadow:var(--shadow-sm);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:76px;
  position:relative;
  gap:16px;
}
.site-logo{
  font-size:1.35rem;
  font-weight:800;
  color:var(--primary);
  letter-spacing:0.5px;
  white-space:nowrap;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.site-logo .logo-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  background:var(--primary);
  color:#fff;
  border-radius:10px;
  font-size:1.1rem;
  font-weight:900;
  box-shadow:0 4px 12px rgba(15,39,68,0.25);
}
.nav-left,.nav-right{display:flex;align-items:center;gap:4px;}
.nav-link{
  padding:8px 18px;
  border-radius:999px;
  font-size:0.95rem;
  font-weight:500;
  color:var(--text-light);
  white-space:nowrap;
}
.nav-link:hover{color:var(--primary);background:#eef2f7;}
.nav-link.active{background:var(--primary);color:#fff;font-weight:600;box-shadow:0 4px 14px rgba(15,39,68,0.18);}
.nav-link:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* Page Banner */
.page-banner{
  position:relative;
  padding:110px 0 90px;
  background:linear-gradient(135deg,rgba(8,24,41,0.88),rgba(15,39,68,0.72)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#fff;
  text-align:center;
}
.page-banner-content{max-width:780px;margin:0 auto;}
.breadcrumb{
  display:flex;
  justify-content:center;
  align-items:center;
  gap:8px;
  font-size:0.9rem;
  opacity:0.85;
  margin-bottom:20px;
}
.breadcrumb a:hover{opacity:1;text-decoration:underline;}
.breadcrumb .sep{opacity:0.5;}
.page-banner h1{
  font-size:2.7rem;
  font-weight:900;
  line-height:1.25;
  margin-bottom:18px;
  letter-spacing:1px;
}
.page-banner .sub-line{
  font-size:1.1rem;
  opacity:0.92;
  max-width:640px;
  margin:0 auto 30px;
  line-height:1.7;
}
.banner-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--accent);
  color:var(--primary-dark);
  font-weight:700;
  font-size:1rem;
  padding:13px 34px;
  border-radius:999px;
  box-shadow:0 10px 28px rgba(212,167,44,0.35);
  transition:var(--transition);
}
.banner-btn:hover{
  transform:translateY(-3px);
  box-shadow:0 14px 34px rgba(212,167,44,0.45);
  background:var(--accent-light);
}

/* Steps */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step-card{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px 24px 28px;
  text-align:center;
  position:relative;
  transition:var(--transition);
}
.step-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow);
}
.step-num{
  position:absolute;
  top:16px;
  right:22px;
  font-size:2.6rem;
  font-weight:900;
  color:rgba(15,39,68,0.07);
  line-height:1;
}
.step-icon{
  width:64px;height:64px;
  background:var(--primary);
  color:#fff;
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 18px;
  font-size:1.5rem;
  box-shadow:0 8px 20px rgba(15,39,68,0.2);
}
.step-card h3{font-size:1.12rem;font-weight:700;color:var(--primary);margin-bottom:10px;}
.step-card p{font-size:0.92rem;color:var(--text-light);line-height:1.65;}

/* Methods */
.methods-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.method-card{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:40px 30px 32px;
  text-align:center;
  transition:var(--transition);
}
.method-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
}
.method-icon{
  width:58px;height:58px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 20px;
  font-size:1.35rem;
  background:linear-gradient(135deg,rgba(212,167,44,0.18),rgba(212,167,44,0.05));
  color:var(--accent);
}
.method-card h3{font-size:1.2rem;font-weight:700;color:var(--primary);margin-bottom:12px;}
.method-card .method-desc{font-size:0.95rem;color:var(--text-light);line-height:1.7;margin-bottom:20px;}
.method-features{display:flex;flex-direction:column;gap:8px;align-items:center;}
.method-features li{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:0.9rem;
  color:var(--text);
  background:#f7f9fc;
  border:1px solid var(--border);
  border-radius:999px;
  padding:6px 14px;
}
.method-features li i{color:var(--accent);font-size:0.82rem;}

/* Safety */
.safety-tips{background:var(--bg-dark);position:relative;overflow:hidden;}
.safety-tips::before{
  content:"";
  position:absolute;
  top:-60px;right:-60px;
  width:280px;height:280px;
  border-radius:50%;
  background:rgba(212,167,44,0.08);
}
.safety-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;}
.safety-item{
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.09);
  border-radius:var(--radius);
  padding:32px 28px;
  transition:var(--transition);
}
.safety-item:hover{background:rgba(255,255,255,0.08);transform:translateY(-4px);}
.safety-icon{
  width:52px;height:52px;
  border-radius:14px;
  background:rgba(212,167,44,0.16);
  color:var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.3rem;
  margin-bottom:18px;
}
.safety-item h3{font-size:1.1rem;font-weight:700;color:#fff;margin-bottom:10px;}
.safety-item p{font-size:0.93rem;color:rgba(255,255,255,0.75);line-height:1.7;}

/* Feature */
.feature-inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.feature-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);position:relative;}
.feature-img img{width:100%;height:400px;object-fit:cover;transition:transform 0.6s ease;}
.feature-img:hover img{transform:scale(1.04);}
.feature-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 60%,rgba(8,24,41,0.3));
}
.feature-body h3{font-size:1.8rem;font-weight:800;color:var(--primary);line-height:1.35;margin-bottom:16px;}
.feature-body p{color:var(--text-light);font-size:1rem;line-height:1.8;margin-bottom:24px;}
.feature-list{display:flex;flex-direction:column;gap:12px;margin-bottom:30px;}
.feature-list li{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:0.98rem;
  color:var(--text);
}
.feature-list li i{
  width:26px;height:26px;
  border-radius:50%;
  background:rgba(212,167,44,0.14);
  color:var(--accent);
  font-size:0.75rem;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.feature-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-weight:600;
  font-size:0.98rem;
}
.feature-link:hover{color:var(--accent);gap:10px;}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;}
.faq-item{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius);
  margin-bottom:14px;
  overflow:hidden;
  transition:var(--transition);
}
.faq-item:hover{border-color:#cfd9e6;box-shadow:var(--shadow-sm);}
.faq-item[open]{box-shadow:var(--shadow);}
.faq-question{
  list-style:none;
  cursor:pointer;
  padding:22px 30px;
  font-size:1.05rem;
  font-weight:600;
  color:var(--text);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
}
.faq-question::-webkit-details-marker{display:none;}
.faq-question::after{
  content:'\f067';
  font-family:'Font Awesome 6 Free';
  font-weight:900;
  font-size:0.95rem;
  color:var(--accent);
  flex-shrink:0;
  transition:transform 0.3s ease;
}
.faq-item[open] .faq-question::after{content:'\f068';transform:rotate(180deg);}
.faq-answer{
  padding:0 30px 24px;
  color:var(--text-light);
  font-size:0.95rem;
  line-height:1.8;
  animation:faqIn 0.3s ease;
}
@keyframes faqIn{
  from{opacity:0;transform:translateY(-4px);}
  to{opacity:1;transform:none;}
}

/* CTA */
.cta-section{padding:60px 0 90px;}
.cta-card{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  border-radius:var(--radius-lg);
  padding:56px 48px;
  text-align:center;
  position:relative;
  overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.cta-card::before{
  content:"";
  position:absolute;
  top:-40px;left:-40px;
  width:200px;height:200px;
  border-radius:50%;
  background:rgba(212,167,44,0.12);
}
.cta-card::after{
  content:"";
  position:absolute;
  bottom:-60px;right:-30px;
  width:240px;height:240px;
  border-radius:50%;
  background:rgba(255,255,255,0.04);
}
.cta-card h2{color:#fff;font-size:1.9rem;font-weight:800;margin-bottom:14px;position:relative;z-index:1;}
.cta-card p{color:rgba(255,255,255,0.8);font-size:1.05rem;max-width:560px;margin:0 auto 28px;position:relative;z-index:1;}
.cta-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--accent);
  color:var(--primary-dark);
  font-weight:700;
  font-size:1rem;
  padding:14px 38px;
  border-radius:999px;
  box-shadow:0 10px 26px rgba(212,167,44,0.35);
  transition:var(--transition);
  position:relative;z-index:1;
}
.cta-btn:hover{
  transform:translateY(-3px);
  background:var(--accent-light);
  box-shadow:0 14px 34px rgba(212,167,44,0.45);
}
.cta-support{
  margin-top:16px;
  font-size:0.9rem;
  color:rgba(255,255,255,0.55);
  position:relative;z-index:1;
}
.cta-support a{color:rgba(255,255,255,0.8);text-decoration:underline;}
.cta-support a:hover{color:#fff;}

/* Footer */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,0.75);padding-top:64px;}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:44px;align-items:start;}
.footer-brand .footer-logo{font-size:1.25rem;font-weight:800;color:#fff;display:inline-block;margin-bottom:14px;}
.footer-brand p{font-size:0.95rem;line-height:1.75;max-width:360px;color:rgba(255,255,255,0.65);}
.footer-links h4,.footer-support h4{
  font-size:1rem;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:0.92rem;color:rgba(255,255,255,0.65);transition:var(--transition);}
.footer-links a:hover{color:var(--accent);transform:translateX(4px);}
.footer-support p{font-size:0.92rem;line-height:2;color:rgba(255,255,255,0.65);}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:20px 0;}
.footer-bottom .container{display:flex;justify-content:center;}
.footer-bottom p{font-size:0.86rem;color:rgba(255,255,255,0.5);text-align:center;}

/* Responsive */
@media (max-width:1024px){
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .methods-grid{grid-template-columns:1fr 1fr;}
  .safety-grid{grid-template-columns:1fr 1fr;}
  .feature-inner{gap:36px;}
  .section{padding:72px 0;}
}
@media (max-width:991px){
  .header-inner{
    flex-wrap:wrap;
    height:auto;
    padding:16px 0 12px;
    row-gap:8px;
    justify-content:center;
  }
  .site-logo{order:-1;width:100%;text-align:center;justify-content:center;}
  .nav-left,.nav-right{flex:1;justify-content:center;}
  .nav-right{justify-content:center;}
  .nav-link{font-size:0.9rem;padding:7px 14px;}
}
@media (max-width:768px){
  .page-banner{padding:80px 0 64px;}
  .page-banner h1{font-size:2rem;}
  .page-banner .sub-line{font-size:1rem;}
  .section{padding:60px 0;}
  .section-title{font-size:1.65rem;}
  .steps-grid{gap:16px;}
  .step-card{padding:28px 18px 22px;}
  .methods-grid{grid-template-columns:1fr;}
  .safety-grid{grid-template-columns:1fr;}
  .feature-inner{grid-template-columns:1fr;}
  .feature-img img{height:280px;}
  .feature-body h3{font-size:1.4rem;}
  .cta-card{padding:40px 24px;}
  .cta-card h2{font-size:1.5rem;}
  .footer-inner{grid-template-columns:1fr;gap:36px;padding-bottom:36px;}
  .nav-left,.nav-right{width:100%;flex:auto;}
  .nav-right{margin-top:4px;}
}
@media (max-width:520px){
  .container{padding:0 18px;}
  .page-banner h1{font-size:1.65rem;}
  .page-banner .sub-line{font-size:0.95rem;}
  .steps-grid{grid-template-columns:1fr;}
  .section-title{font-size:1.45rem;}
  .faq-question{padding:18px 20px;font-size:0.98rem;}
  .faq-answer{padding:0 20px 18px;font-size:0.9rem;}
  .cta-btn{width:100%;justify-content:center;}
  .site-logo{font-size:1.1rem;}
  .site-logo .logo-mark{width:32px;height:32px;font-size:0.95rem;}
  .nav-link{padding:6px 12px;font-size:0.85rem;}
}

/* roulang page: article */
:root {
  --primary: #2d5bff;
  --primary-dark: #1a3fc0;
  --primary-light: #e8edff;
  --accent: #06b6d4;
  --accent-soft: #e0f7fa;
  --bg: #f4f7fb;
  --bg-white: #ffffff;
  --bg-dark: #0b1424;
  --text: #0f1e3d;
  --text-body: #3c4a63;
  --text-muted: #6b7a90;
  --border: #dfe6f0;
  --border-light: #eef2f8;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(15,30,61,.06);
  --shadow: 0 6px 20px rgba(15,30,61,.08);
  --shadow-lg: 0 18px 48px rgba(15,30,61,.12);
  --shadow-primary: 0 10px 30px rgba(45,91,255,.22);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
button { font-family: inherit; cursor: pointer; border: 0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 1px 4px rgba(15,30,61,.04);
}
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 76px;
  gap: 16px;
}
.nav-left, .nav-right { display: flex; align-items: center; gap: 6px; }
.nav-right { justify-content: flex-end; }
.logo {
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: .01em;
  white-space: nowrap;
  transition: color .2s ease;
}
.logo:hover { color: var(--primary); }
.nav-link {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: .93rem;
  font-weight: 500;
  color: var(--text-body);
  transition: background .2s, color .2s;
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-toggle {
  display: none;
  background: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s, opacity .2s; }
.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  box-shadow: var(--shadow-lg);
  padding: 14px 24px 22px;
  display: none;
  border-bottom: 1px solid var(--border-light);
  z-index: 99;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 4px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-body);
  border-bottom: 1px solid var(--border-light);
}
.mobile-menu a:last-child { border-bottom: 0; }
.mobile-menu a:hover { color: var(--primary); }

/* Article Hero */
.article-hero {
  position: relative;
  background: linear-gradient(120deg, rgba(8,15,30,.94) 0%, rgba(15,42,94,.88) 55%, rgba(29,78,216,.82) 100%), url('/assets/images/backpic/back-2.png') center 30% / cover no-repeat;
  padding: 86px 0 118px;
  color: #fff;
}
.article-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .88rem;
  color: rgba(255,255,255,.72);
  margin-bottom: 20px;
}
.breadcrumb a { color: rgba(255,255,255,.88); transition: color .2s; }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.breadcrumb-sep { opacity: .5; }
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.24);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .05em;
  margin-bottom: 18px;
  backdrop-filter: blur(6px);
}
.article-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.25;
  font-weight: 800;
  max-width: 860px;
  margin-bottom: 16px;
  color: #fff;
  letter-spacing: .01em;
}
.hero-desc {
  font-size: 1.06rem;
  line-height: 1.8;
  color: rgba(255,255,255,.82);
  max-width: 720px;
  margin-bottom: 26px;
}
.hero-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; font-size: .88rem; color: rgba(255,255,255,.72); }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }

/* Main Layout */
.article-main { padding-bottom: 80px; }
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 40px;
  margin-top: -40px;
  align-items: start;
}
.article-content-col { min-width: 0; }
.article-card {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
}
.article-cover { width: 100%; height: 320px; object-fit: cover; }
.article-body { padding: 44px 48px; }
.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: .88rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}
.article-meta-bar .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta-bar .meta-item strong { color: var(--text-body); font-weight: 600; }
.article-summary {
  background: var(--bg);
  border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0;
  padding: 20px 24px;
  margin-bottom: 28px;
}
.article-summary strong { color: var(--text); font-size: 1rem; display: block; margin-bottom: 6px; }
.article-summary p { color: var(--text-body); font-size: .95rem; line-height: 1.8; margin: 0; }
.article-content { font-size: 1.02rem; line-height: 1.9; color: var(--text-body); }
.article-content p { margin-bottom: 1.2em; }
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin: 2em 0 .8em;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}
.article-content h3 { font-size: 1.22rem; font-weight: 700; color: var(--text); margin: 1.8em 0 .6em; }
.article-content ul, .article-content ol { margin: 0 0 1.4em; padding-left: 1.6em; }
.article-content li { margin-bottom: .5em; }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  color: var(--text);
  margin: 1.6em 0;
  font-size: 1.04rem;
}
.article-content img { border-radius: 16px; box-shadow: var(--shadow); margin: 1.6em 0; }
.article-content a { color: var(--primary); font-weight: 500; border-bottom: 1px solid transparent; }
.article-content a:hover { border-bottom-color: currentColor; }
.article-content pre, .article-content code { background: var(--bg-dark); color: #e2e8f0; border-radius: 8px; font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; }
.article-content code { padding: 2px 6px; font-size: .9em; }
.article-content pre { padding: 16px; overflow-x: auto; margin: 1.6em 0; }
.article-content pre code { padding: 0; background: transparent; }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: .95rem; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content th { background: var(--bg); font-weight: 600; }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: border-color .2s, color .2s;
}
.tag:hover { border-color: var(--primary); color: var(--primary); }

/* Not Found */
.not-found-card {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  padding: 64px 40px;
  text-align: center;
}
.not-found-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 84px;
  height: 84px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 20px;
}
.not-found-card h2 { font-size: 1.5rem; color: var(--text); margin-bottom: 12px; }
.not-found-card p { color: var(--text-muted); margin-bottom: 24px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: .95rem;
  font-weight: 600;
  transition: all .25s ease;
  line-height: 1.4;
}
.btn-primary-dark { background: var(--primary); color: #fff; }
.btn-primary-dark:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-primary); }
.btn-primary { background: #fff; color: var(--primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(0,0,0,.2); }
.btn-ghost { background: rgba(255,255,255,.14); color: #fff; border: 1px solid rgba(255,255,255,.3); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255,255,255,.24); transform: translateY(-2px); }

/* Sidebar */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-widget {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.sidebar-widget h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}
.side-info-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-light);
  font-size: .95rem;
}
.side-info-row:last-child { border-bottom: 0; }
.side-info-label { color: var(--text-muted); flex-shrink: 0; }
.side-info-value { color: var(--text-body); font-weight: 500; text-align: right; word-break: break-all; }
.quick-entry {
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--bg);
  color: var(--text-body);
  font-size: .95rem;
  margin-bottom: 8px;
  border: 1px solid transparent;
  transition: all .25s ease;
}
.quick-entry:last-child { margin-bottom: 0; }
.quick-entry:hover { background: var(--primary-light); color: var(--primary); border-color: rgba(45,91,255,.15); transform: translateX(4px); }
.empty-text { font-size: .9rem; color: var(--text-muted); padding: 8px 0; }
.side-post {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  align-items: center;
}
.side-post:last-child { border-bottom: 0; padding-bottom: 0; }
.side-post:first-child { padding-top: 0; }
.side-post img { width: 88px; height: 62px; object-fit: cover; border-radius: 10px; flex-shrink: 0; background: var(--bg); }
.side-post div { min-width: 0; flex: 1; }
.side-post span {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  transition: color .2s;
}
.side-post small { font-size: .78rem; color: var(--text-muted); margin-top: 4px; display: block; }
.side-post:hover span { color: var(--primary); }

/* CTA Section */
.article-cta-section { padding-top: 24px; }
.article-cta {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--accent) 120%);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  position: relative;
  overflow: hidden;
  text-align: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.article-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  opacity: .1;
}
.article-cta .cta-inner { position: relative; z-index: 1; max-width: 680px; margin: 0 auto; }
.article-cta h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; margin-bottom: 12px; }
.article-cta p { color: rgba(255,255,255,.85); margin-bottom: 24px; }
.cta-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Related Section */
.related-section { padding: 80px 0 0; }
.related-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 32px; flex-wrap: wrap; gap: 12px; }
.related-header h2 { font-size: 1.7rem; font-weight: 800; color: var(--text); }
.more-link { font-size: .92rem; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.more-link:hover { color: var(--primary-dark); }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.related-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
  display: block;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.related-card-img { position: relative; height: 170px; overflow: hidden; background: var(--bg); }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .related-card-img img { transform: scale(1.05); }
.related-card-img .cat-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,.92);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: .76rem;
  font-weight: 600;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.related-card-body { padding: 18px 20px 22px; }
.related-card-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  transition: color .2s;
}
.related-card:hover .related-card-body h3 { color: var(--primary); }
.related-card-body p {
  font-size: .88rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 12px;
}
.related-card-meta { display: flex; justify-content: space-between; gap: 10px; font-size: .8rem; color: var(--text-muted); flex-wrap: wrap; }
.related-card-meta span:last-child { color: var(--primary); font-weight: 500; }

/* Footer */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.75); padding-top: 64px; }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; padding-bottom: 40px; }
.footer-brand .footer-logo { font-size: 1.25rem; font-weight: 800; color: #fff; display: block; margin-bottom: 14px; transition: color .2s; }
.footer-brand .footer-logo:hover { color: var(--accent); }
.footer-brand p { font-size: .92rem; line-height: 1.7; color: rgba(255,255,255,.6); max-width: 320px; }
.footer-links h4, .footer-support h4 { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links a { display: block; padding: 6px 0; font-size: .9rem; color: rgba(255,255,255,.6); transition: color .2s, padding-left .2s; }
.footer-links a:hover { color: #fff; padding-left: 6px; }
.footer-support p { font-size: .9rem; color: rgba(255,255,255,.6); line-height: 1.8; margin-bottom: 6px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; }
.footer-bottom p { font-size: .85rem; color: rgba(255,255,255,.42); text-align: center; }

/* Responsive */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; align-items: start; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .header-inner { grid-template-columns: 1fr auto; height: 66px; }
  .nav-left, .nav-right { display: none; }
  .nav-toggle { display: flex; grid-column: 2; grid-row: 1; justify-self: end; }
  .logo { grid-column: 1; grid-row: 1; justify-self: start; font-size: 1.16rem; }
  .article-hero { padding: 60px 0 96px; }
  .article-hero h1 { font-size: 1.65rem; }
  .hero-desc { font-size: .95rem; }
  .article-body { padding: 30px 24px; }
  .article-cover { height: 220px; }
  .article-cta { padding: 40px 24px; }
  .related-section { padding-top: 60px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .related-card { max-width: 100%; }
  .related-card-img { height: 200px; }
  .article-main { padding-bottom: 60px; }
  .article-cta h2 { font-size: 1.35rem; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .cta-buttons .btn { width: 100%; max-width: 280px; }
  .not-found-card { padding: 40px 24px; }
}
@media (max-width: 520px) {
  .logo { font-size: 1.02rem; letter-spacing: 0; }
  .article-meta-bar { gap: 10px; font-size: .82rem; }
  .hero-date { font-size: .82rem; }
  .article-content { font-size: .98rem; }
}

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root {
  --primary: #e5443b;
  --primary-dark: #c92f27;
  --primary-light: #fdeceb;
  --secondary: #f5b301;
  --secondary-light: #fff6e0;
  --bg: #f5f6fa;
  --surface: #ffffff;
  --text: #17233d;
  --text-weak: #67707e;
  --border: #e4e7ef;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 8px 30px rgba(17, 25, 45, 0.07);
  --shadow-lg: 0 20px 55px rgba(17, 25, 45, 0.11);
  --space: 96px;
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Arial, sans-serif;
}

/* ============ Reset / Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; }

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  cursor: pointer;
  transition: all .28s ease;
  border: 2px solid transparent;
  text-align: center;
  letter-spacing: .3px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 22px rgba(229, 68, 59, 0.32);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(229, 68, 59, 0.38);
}
.btn-ghost {
  border-color: rgba(255, 255, 255, 0.75);
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}
.btn-lg { padding: 16px 44px; font-size: 16px; }
.btn:focus-visible, .nav-link:focus-visible, .text-link:focus-visible, .faq-summary:focus-visible {
  outline: 3px solid rgba(229, 68, 59, 0.4);
  outline-offset: 2px;
}

/* ============ 头部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 18px rgba(17, 25, 45, 0.04);
}
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 76px;
  gap: 20px;
}
.logo {
  display: inline-flex;
  align-items: center;
  justify-self: center;
  gap: 10px;
  font-weight: 800;
  font-size: 21px;
  color: var(--text);
  letter-spacing: .4px;
  white-space: nowrap;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 19px;
  font-weight: 800;
  box-shadow: 0 6px 16px rgba(229, 68, 59, 0.28);
}
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-left { justify-self: start; }
.nav-right { justify-self: end; }
.nav-link {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 15px;
  color: var(--text);
  transition: all .25s ease;
  position: relative;
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: #fff; background: var(--primary); box-shadow: 0 4px 14px rgba(229, 68, 59, 0.25); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  justify-self: end;
  padding: 8px 4px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--text);
  transition: all .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
.mobile-menu {
  display: none;
  flex-direction: column;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 14px 20px 20px;
  gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 500;
  color: var(--text);
  background: var(--bg);
  transition: all .25s ease;
}
.mobile-menu a:hover, .mobile-menu a.active { background: var(--primary); color: #fff; }

/* ============ Hero 横幅 ============ */
.hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center 30%;
  color: #fff;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(15, 22, 40, 0.82) 10%, rgba(20, 28, 52, 0.55) 50%, rgba(20, 28, 52, 0.2) 100%);
  z-index: -1;
}
.hero-content {
  padding: 60px 0;
  max-width: 760px;
}
.hero-badge {
  display: inline-block;
  padding: 7px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .6px;
  backdrop-filter: blur(4px);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 46px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: .6px;
  margin-bottom: 18px;
}
.hero h1 span {
  display: block;
  background: linear-gradient(135deg, var(--secondary), #ffe08a);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 34px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============ 通用板块 ============ */
.section { padding: var(--space) 0; }
.section-gray { background: var(--bg); }
.section-light { background: var(--secondary-light); }
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .8px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text);
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-weak);
  font-size: 16px;
}

/* ============ 会员等级卡片 ============ */
.level-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.level-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 36px 28px 30px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-align: center;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.level-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity .3s ease;
}
.level-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.level-card:hover::after { opacity: 1; }
.level-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #8a93a8, #4b5468);
  box-shadow: 0 8px 22px rgba(75, 84, 104, 0.3);
}
.level-card:nth-child(2) .level-icon { background: linear-gradient(135deg, #d9a94e, #b8822d); box-shadow: 0 8px 22px rgba(184, 130, 45, 0.3); }
.level-card:nth-child(3) .level-icon { background: linear-gradient(135deg, #7fb5d9, #4a7fa8); box-shadow: 0 8px 22px rgba(74, 127, 168, 0.3); }
.level-card:nth-child(4) .level-icon { background: linear-gradient(135deg, #e5443b, #b32822); box-shadow: 0 8px 22px rgba(229, 68, 59, 0.3); }
.level-card h3 { font-size: 21px; font-weight: 700; margin-bottom: 6px; }
.level-card .level-desc { color: var(--text-weak); font-size: 14px; margin-bottom: 22px; }
.level-card ul { text-align: left; }
.level-card li {
  padding: 7px 0 7px 24px;
  position: relative;
  font-size: 14px;
  color: var(--text);
  border-bottom: 1px dashed var(--border);
}
.level-card li:last-child { border-bottom: none; }
.level-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* ============ 福利卡片网格 ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.welfare-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all .35s ease;
  display: flex;
  flex-direction: column;
}
.welfare-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.card-img {
  position: relative;
  height: 180px;
  overflow: hidden;
}
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.welfare-card:hover .card-img img { transform: scale(1.06); }
.card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(17, 25, 45, 0.35));
}
.card-body { padding: 24px 22px 26px; display: flex; flex-direction: column; flex: 1; }
.card-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--secondary-light);
  color: #b8822d;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .4px;
  margin-bottom: 12px;
}
.card-body h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.card-body p { font-size: 14px; color: var(--text-weak); flex: 1; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  transition: gap .25s ease;
}
.text-link:hover { gap: 10px; }

/* ============ 数据统计 ============ */
.stats-section {
  background: linear-gradient(135deg, #1a2235 0%, #232f4b 100%);
  padding: 80px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.stat-block strong {
  display: block;
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 6px;
}
.stat-block span { font-size: 15px; color: rgba(255, 255, 255, 0.7); }
.stat-block:not(:last-child) { border-right: 1px solid rgba(255, 255, 255, 0.12); }

/* ============ 流程步骤 ============ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 36px 26px 30px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
  transition: all .3s ease;
}
.step:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 18px;
  margin-bottom: 18px;
}
.step h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.step p { font-size: 14px; color: var(--text-weak); }
@media (max-width: 1024px) {
  .step:not(:last-child)::after { display: none; }
}

/* ============ FAQ ============ */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color .25s ease;
}
.faq-item:hover { border-color: rgba(229, 68, 59, 0.3); }
.faq-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  user-select: none;
  background: var(--surface);
  transition: background .25s ease;
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-summary::after {
  content: "+";
  font-size: 26px;
  font-weight: 300;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform .3s ease;
}
.faq-item[open] .faq-summary::after { transform: rotate(45deg); }
.faq-answer { padding: 0 24px 22px; color: var(--text-weak); font-size: 15px; line-height: 1.85; }

/* ============ CTA ============ */
.cta-section {
  padding: 90px 0;
  background: linear-gradient(135deg, rgba(229, 68, 59, 0.96), rgba(200, 45, 38, 0.96)),
    url('/assets/images/backpic/back-2.png') center / cover;
  text-align: center;
  color: #fff;
}
.cta-section h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: .5px;
}
.cta-section p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.86);
  max-width: 600px;
  margin: 0 auto 30px;
}

/* ============ 页脚 ============ */
.site-footer {
  background: #131a29;
  color: rgba(255, 255, 255, 0.72);
  padding-top: 70px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 50px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  display: inline-block;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: .4px;
}
.footer-brand p { font-size: 14px; line-height: 1.85; max-width: 320px; }
.footer-links h4, .footer-support h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-links h4::after, .footer-support h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--primary);
}
.footer-links a {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: all .25s ease;
}
.footer-links a:hover { color: var(--secondary); padding-left: 4px; }
.footer-support p { font-size: 14px; line-height: 1.9; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
  :root { --space: 72px; }
  .level-grid, .card-grid, .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-block:nth-child(2) { border-right: none; }
  .stat-block { padding: 16px 0; }
}

@media (max-width: 900px) {
  .header-inner { grid-template-columns: auto 1fr auto; }
  .nav-left, .nav-right { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu.open { display: flex; }
  .logo { justify-self: center; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  :root { --space: 56px; }
  .hero { min-height: 420px; }
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 16px; }
  .section-head h2 { font-size: 26px; }
  .level-grid, .card-grid, .steps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-block:not(:last-child) { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.12); padding-bottom: 18px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-actions .btn { width: 100%; }
  .faq-summary { padding: 16px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px 18px; }
}

/* roulang page: category2 */
:root {
  --primary: #16233b;
  --primary-dark: #0f1a2e;
  --primary-light: #1f3050;
  --secondary: #e8b923;
  --secondary-hover: #d4a91e;
  --bg: #f4f6f9;
  --bg-light: #f9fafc;
  --white: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 4px rgba(15, 26, 46, .06);
  --shadow: 0 12px 32px rgba(15, 26, 46, .09);
  --shadow-lg: 0 24px 48px rgba(15, 26, 46, .14);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: .25s cubic-bezier(.4, 0, .2, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
summary { list-style: none; }
summary::-webkit-details-marker { display: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-tag { display: inline-block; color: var(--secondary); background: rgba(232, 185, 35, .1); border: 1px solid rgba(232, 185, 35, .2); padding: 5px 16px; border-radius: 30px; font-size: 13px; font-weight: 600; letter-spacing: 1px; margin-bottom: 14px; }
.section-head h2 { font-size: 34px; font-weight: 800; color: var(--primary); line-height: 1.25; margin-bottom: 12px; letter-spacing: .5px; }
.section-head p { font-size: 16px; color: var(--text-light); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 12px; font-size: 15px; font-weight: 600; transition: var(--transition); border: 2px solid transparent; line-height: 1.5; }
.btn-primary { background: var(--secondary); color: var(--primary-dark); box-shadow: 0 4px 14px rgba(232, 185, 35, .3); }
.btn-primary:hover { background: var(--secondary-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232, 185, 35, .4); }
.btn-outline { border-color: rgba(255, 255, 255, .6); color: #fff; background: rgba(255, 255, 255, .08); backdrop-filter: blur(4px); }
.btn-outline:hover { background: rgba(255, 255, 255, .16); border-color: #fff; transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0, 0, 0, .1); }
.btn-light:hover { background: var(--secondary); color: var(--primary-dark); transform: translateY(-2px); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid rgba(232, 185, 35, .6); outline-offset: 2px; border-radius: 4px; }
.header-spacer { height: 72px; }
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255, 255, 255, .92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); transition: box-shadow var(--transition); }
.site-header.scrolled { box-shadow: 0 4px 20px rgba(15, 26, 46, .08); }
.header-inner { display: flex; align-items: center; justify-content: center; height: 72px; position: relative; }
.nav-left { display: flex; align-items: center; gap: 2px; margin-right: auto; }
.nav-right { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav-link { display: inline-flex; align-items: center; padding: 8px 18px; border-radius: 10px; font-size: 15px; font-weight: 500; color: var(--text-light); transition: var(--transition); line-height: 1.4; }
.nav-link:hover { color: var(--primary); background: rgba(22, 35, 59, .05); }
.nav-link.active { color: var(--primary); background: rgba(22, 35, 59, .07); font-weight: 600; }
.site-logo { font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: 1px; white-space: nowrap; margin: 0 20px; transition: opacity var(--transition); position: relative; z-index: 2; }
.site-logo:hover { opacity: .85; }
.site-logo .logo-dot { color: var(--secondary); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; border-radius: 10px; align-items: center; justify-content: center; transition: background var(--transition); position: absolute; right: 16px; top: 50%; transform: translateY(-50%); z-index: 3; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }
.nav-toggle:hover { background: rgba(22, 35, 59, .06); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu { display: none; position: fixed; top: 72px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--border); box-shadow: var(--shadow); padding: 12px 16px 20px; z-index: 999; flex-direction: column; gap: 4px; }
.mobile-menu.open { display: flex; animation: menuFade .3s ease; }
.mobile-menu .nav-link { padding: 14px 18px; border-radius: 12px; font-size: 16px; }
.mobile-menu .nav-link.active { background: rgba(22, 35, 59, .06); color: var(--primary); font-weight: 600; }
@keyframes menuFade { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
.page-hero { position: relative; padding: 110px 0 100px; background-size: cover; background-position: center; text-align: center; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10, 18, 34, .92) 0%, rgba(22, 35, 59, .78) 50%, rgba(31, 48, 80, .68) 100%); }
.hero-content { position: relative; z-index: 1; }
.hero-tag { display: inline-block; background: rgba(232, 185, 35, .15); border: 1px solid rgba(232, 185, 35, .35); color: var(--secondary); padding: 6px 18px; border-radius: 30px; font-size: 14px; font-weight: 600; letter-spacing: 1px; margin-bottom: 20px; }
.page-hero h1 { color: #fff; font-size: 44px; font-weight: 800; line-height: 1.2; letter-spacing: 1px; margin-bottom: 16px; text-shadow: 0 2px 20px rgba(0, 0, 0, .3); }
.page-hero p { color: rgba(255, 255, 255, .85); font-size: 17px; max-width: 660px; margin: 0 auto 32px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-stats { position: relative; z-index: 1; display: flex; justify-content: center; gap: 40px; margin-top: 52px; flex-wrap: wrap; }
.hero-stats .stat { text-align: center; padding: 16px 24px; background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .14); border-radius: 16px; backdrop-filter: blur(6px); min-width: 130px; }
.hero-stats .stat strong { display: block; font-size: 30px; font-weight: 800; color: var(--secondary); line-height: 1.2; }
.hero-stats .stat span { font-size: 13px; color: rgba(255, 255, 255, .7); margin-top: 4px; display: block; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: var(--white); border-radius: var(--radius); padding: 36px 28px 32px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); text-align: left; position: relative; overflow: hidden; }
.feature-card::after { content: ''; position: absolute; top: 0; right: 0; width: 80px; height: 80px; border-radius: 0 0 0 80px; background: linear-gradient(135deg, transparent 60%, rgba(232, 185, 35, .12)); }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(232, 185, 35, .3); }
.feature-icon { font-size: 40px; margin-bottom: 18px; display: inline-flex; width: 68px; height: 68px; border-radius: 16px; background: rgba(232, 185, 35, .12); align-items: center; justify-content: center; }
.feature-card h3 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.feature-card p { font-size: 15px; color: var(--text-light); line-height: 1.7; }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.guide-card { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); display: flex; flex-direction: column; }
.guide-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.guide-cover { position: relative; height: 180px; overflow: hidden; }
.guide-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.guide-card:hover .guide-cover img { transform: scale(1.05); }
.guide-tag { position: absolute; top: 14px; left: 14px; background: rgba(22, 35, 59, .82); color: #fff; padding: 4px 14px; border-radius: 20px; font-size: 12px; font-weight: 600; backdrop-filter: blur(4px); }
.guide-body { padding: 24px 24px 20px; display: flex; flex-direction: column; flex: 1; }
.guide-body h3 { font-size: 18px; font-weight: 700; color: var(--primary); line-height: 1.45; margin-bottom: 8px; transition: color var(--transition); }
.guide-card:hover .guide-body h3 { color: var(--secondary-hover); }
.guide-body p { font-size: 14px; color: var(--text-light); line-height: 1.65; flex: 1; }
.guide-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); font-size: 13px; color: var(--text-light); }
.text-link { color: var(--secondary); font-weight: 600; transition: color var(--transition); }
.text-link:hover { color: var(--secondary-hover); }
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cat-item { background: var(--white); border-radius: var(--radius); padding: 32px 22px 28px; text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); }
.cat-item:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: rgba(232, 185, 35, .4); }
.cat-icon { display: inline-flex; width: 60px; height: 60px; border-radius: 16px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); align-items: center; justify-content: center; font-size: 26px; color: #fff; margin-bottom: 16px; box-shadow: 0 6px 16px rgba(22, 35, 59, .25); }
.cat-item h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.cat-item p { font-size: 13px; color: var(--text-light); line-height: 1.6; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; background: var(--white); border-radius: var(--radius); padding: 36px 24px 28px; text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); }
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.step-num { display: inline-flex; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; align-items: center; justify-content: center; font-size: 20px; font-weight: 800; margin-bottom: 16px; box-shadow: 0 6px 16px rgba(22, 35, 59, .25); position: relative; z-index: 1; }
.step:nth-child(2) .step-num { background: var(--secondary); color: var(--primary-dark); box-shadow: 0 6px 16px rgba(232, 185, 35, .3); }
.step h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-light); line-height: 1.65; }
.step-arrow { position: absolute; top: 44px; right: -18px; color: var(--border); font-size: 18px; z-index: 2; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--white); border: 1px solid var(--border); border-radius: 14px; margin-bottom: 14px; overflow: hidden; transition: border-color var(--transition), box-shadow var(--transition); }
.faq-item[open] { border-color: rgba(232, 185, 35, .4); box-shadow: var(--shadow-sm); }
.faq-item summary { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--primary); transition: color var(--transition); }
.faq-item summary:hover { color: var(--secondary-hover); }
.faq-item summary .faq-icon { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: rgba(22, 35, 59, .06); display: inline-flex; align-items: center; justify-content: center; transition: transform var(--transition), background var(--transition); margin-left: 14px; }
.faq-item[open] summary .faq-icon { transform: rotate(45deg); background: rgba(232, 185, 35, .15); }
.faq-item summary .faq-icon svg { width: 14px; height: 14px; fill: currentColor; }
.faq-answer { padding: 0 24px 22px; color: var(--text-light); font-size: 15px; line-height: 1.75; }
.section-cta .cta-box { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); border-radius: 24px; padding: 56px 40px; text-align: center; color: #fff; box-shadow: var(--shadow-lg); position: relative; overflow: hidden; }
.section-cta .cta-box::before { content: ''; position: absolute; top: -60px; right: -60px; width: 200px; height: 200px; background: rgba(232, 185, 35, .2); border-radius: 50%; }
.section-cta .cta-box::after { content: ''; position: absolute; bottom: -80px; left: -40px; width: 160px; height: 160px; background: rgba(255, 255, 255, .06); border-radius: 50%; }
.cta-box h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; position: relative; z-index: 1; }
.cta-box p { color: rgba(255, 255, 255, .8); font-size: 16px; margin-bottom: 28px; position: relative; z-index: 1; }
.cta-box .btn { position: relative; z-index: 1; }
.site-footer { background: var(--primary-dark); color: rgba(255, 255, 255, .65); }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 48px; padding: 64px 0 44px; }
.footer-brand .footer-logo { font-size: 24px; font-weight: 800; color: #fff; letter-spacing: 1px; display: inline-block; margin-bottom: 14px; }
.footer-brand .footer-logo .logo-dot { color: var(--secondary); }
.footer-brand p { font-size: 14px; line-height: 1.75; max-width: 320px; }
.footer-links h4, .footer-support h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; letter-spacing: .5px; }
.footer-links a { display: block; color: rgba(255, 255, 255, .65); font-size: 14px; padding: 4px 0; transition: color var(--transition), padding-left var(--transition); }
.footer-links a:hover { color: var(--secondary); padding-left: 6px; }
.footer-support p { font-size: 14px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.footer-support p svg { flex-shrink: 0; width: 16px; height: 16px; fill: var(--secondary); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 18px 0; text-align: center; font-size: 13px; color: rgba(255, 255, 255, .45); }
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
@media (max-width: 1024px) {
  .nav-left, .nav-right { display: none; }
  .nav-toggle { display: flex; }
  .site-logo { margin: 0; font-size: 20px; }
  .header-inner { justify-content: center; }
  .page-hero { padding: 90px 0 80px; }
  .page-hero h1 { font-size: 36px; }
  .grid-3, .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step-arrow { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .section-head h2 { font-size: 28px; }
  .page-hero { padding: 70px 0 60px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero p { font-size: 15px; }
  .hero-stats { gap: 12px; margin-top: 36px; }
  .hero-stats .stat { min-width: 105px; padding: 12px 16px; }
  .hero-stats .stat strong { font-size: 24px; }
  .grid-3, .guide-grid, .cat-grid, .steps { grid-template-columns: 1fr; }
  .guide-cover { height: 200px; }
  .section-cta .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 24px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 32px; }
  .footer-bottom .container { flex-direction: column; }
  .btn { padding: 11px 22px; font-size: 14px; }
}