/* roulang page: index */
:root{
  --bg-primary:#0B1021;
  --bg-secondary:#0E1530;
  --bg-deep:#080B17;
  --glass-bg:rgba(255,255,255,0.04);
  --glass-bg-hover:rgba(255,255,255,0.08);
  --glass-border:rgba(255,255,255,0.12);
  --glass-highlight:inset 0 1px 0 rgba(255,255,255,0.08);
  --brand-purple:#7C5CFF;
  --accent-cyan:#00E5C3;
  --accent-amber:#FFB648;
  --text-primary:#E8EAF6;
  --text-secondary:#A7ADCC;
  --text-weak:#667095;
  --radius-btn:8px;
  --radius-card:16px;
  --radius-glass:20px;
  --radius-img:12px;
  --shadow-card:0 12px 32px rgba(0,0,0,0.25);
  --glow-cyan:0 0 24px rgba(0,229,195,0.4);
  --sidebar-w:240px;
  --sidebar-w-md:200px;
  --content-pad-xl:60px;
  --content-pad-lg:40px;
  --content-pad-md:32px;
  --content-pad-sm:16px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'HarmonyOS Sans SC','MiSans','PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.75 !important;
  font-size:16px;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
a:hover{color:var(--accent-cyan)}
img{max-width:100%;height:auto;display:block}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:3px}
.container-custom{max-width:1200px;margin:0 auto;padding:0 var(--content-pad-lg)}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;letter-spacing:-0.02em}

.sidebar{
  position:fixed;left:0;top:0;width:var(--sidebar-w);height:100vh;
  background:rgba(8,12,24,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-right:1px solid rgba(255,255,255,0.08);
  z-index:1050;
  display:flex;flex-direction:column;
  padding:24px 20px;
  transition:transform .3s ease;
}
.sidebar .brand{
  display:flex;align-items:center;gap:12px;
  padding:0 8px 28px;
  border-bottom:1px solid rgba(255,255,255,0.06);
  margin-bottom:20px;
}
.brand-logo{
  width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand-purple),var(--accent-cyan));
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:800;color:#fff;
  box-shadow:0 4px 16px rgba(124,92,255,0.35);
  flex-shrink:0;
}
.brand-text{font-size:18px;font-weight:700;color:var(--text-primary);letter-spacing:0.02em}
.side-nav{flex:1;display:flex;flex-direction:column;gap:4px}
.nav-group-title{
  font-size:12px;color:var(--text-weak);
  padding:0 12px;margin-bottom:8px;
  letter-spacing:0.08em;text-transform:uppercase;
}
.nav-link{
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 14px;border-radius:10px;
  color:var(--text-secondary);font-size:15px;font-weight:400;
  transition:all .25s ease;
  position:relative;
}
.nav-link i{width:20px;text-align:center;font-size:15px}
.nav-link:hover{
  color:var(--text-primary);
  background:rgba(255,255,255,0.05);
}
.nav-link:hover::before{
  content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--accent-cyan);
}
.nav-link.active{
  background:rgba(124,92,255,0.15);
  color:var(--text-primary);
  font-weight:500;
}
.nav-link.active::before{
  content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--accent-cyan);
}
.sidebar-footer{
  padding-top:16px;border-top:1px solid rgba(255,255,255,0.06);
}
.btn-login-sidebar{
  display:flex;align-items:center;justify-content:center;gap:8px;
  height:46px;border-radius:var(--radius-btn);
  background:linear-gradient(135deg,var(--accent-cyan),#00bcd4);
  color:#0B1021;font-weight:700;font-size:15px;
  border:none;width:100%;
  transition:all .25s ease;
  box-shadow:var(--glow-cyan);
}
.btn-login-sidebar:hover{
  filter:brightness(1.1);
  box-shadow:0 0 36px rgba(0,229,195,0.6);
  color:#0B1021;
}

.main-wrapper{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;flex-direction:column;
}
.mobile-header{
  display:none;
  position:sticky;top:0;z-index:1040;
  background:rgba(8,12,24,0.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,0.08);
  padding:14px 20px;
  align-items:center;justify-content:space-between;
}
.mobile-header .brand{
  display:flex;align-items:center;gap:10px;
}
.mobile-header .brand-logo{
  width:36px;height:36px;border-radius:10px;
  font-size:18px;
}
.mobile-header .brand-text{font-size:16px;font-weight:700}
.mobile-toggle{
  width:42px;height:42px;border-radius:8px;
  background:rgba(255,255,255,0.06);
  border:1px solid var(--glass-border);
  color:var(--text-primary);
  font-size:18px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:all .25s;
}
.mobile-toggle:hover{
  background:rgba(255,255,255,0.12);
  border-color:var(--accent-cyan);
}
.mobile-menu{
  display:none;
  position:fixed;top:68px;left:0;right:0;z-index:1030;
  background:rgba(8,12,24,0.97);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,0.08);
  padding:16px 20px;
  flex-direction:column;gap:4px;
}
.mobile-menu .nav-link{
  height:46px;
}
.mobile-menu .sidebar-footer{
  padding-top:12px;
}
.mobile-menu.open{display:flex}

.hero-section{
  position:relative;
  min-height:620px;
  display:flex;align-items:center;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow:hidden;
}
.hero-section::before{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(to bottom, rgba(11,16,33,0.55) 0%, var(--bg-primary) 100%);
}
.hero-section .container-custom{position:relative;z-index:2;padding-top:60px;padding-bottom:60px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(0,229,195,0.12);
  border:1px solid rgba(0,229,195,0.3);
  color:var(--accent-cyan);
  font-size:13px;font-weight:500;
  padding:5px 14px;border-radius:20px;
  margin-bottom:20px;
}
.hero-badge i{font-size:12px}
.hero-title{
  font-size:56px;font-weight:800;
  line-height:1.15;letter-spacing:-0.02em;
  margin-bottom:20px;
  max-width:700px;
}
.hero-title .gradient-text{
  background:linear-gradient(90deg, var(--brand-purple), var(--accent-cyan));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-subtitle{
  font-size:17px;color:var(--text-secondary);
  max-width:540px;margin-bottom:32px;
  line-height:1.7;
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary-custom{
  display:inline-flex;align-items:center;gap:8px;
  height:50px;padding:0 28px;border-radius:var(--radius-btn);
  background:linear-gradient(135deg,var(--accent-cyan),#00bcd4);
  color:#0B1021;font-size:16px;font-weight:700;border:none;
  cursor:pointer;transition:all .25s ease;
  box-shadow:var(--glow-cyan);
}
.btn-primary-custom:hover{
  filter:brightness(1.12);
  box-shadow:0 0 36px rgba(0,229,195,0.55);
  color:#0B1021;
  transform:translateY(-2px);
}
.btn-secondary-custom{
  display:inline-flex;align-items:center;gap:8px;
  height:50px;padding:0 28px;border-radius:var(--radius-btn);
  background:rgba(255,255,255,0.06);
  border:1px solid var(--glass-border);
  color:var(--text-primary);font-size:16px;font-weight:500;
  cursor:pointer;transition:all .25s ease;
  backdrop-filter:blur(8px);
}
.btn-secondary-custom:hover{
  background:rgba(255,255,255,0.12);
  border-color:var(--accent-cyan);
  color:var(--accent-cyan);
  transform:translateY(-2px);
}

.quick-links{
  position:relative;
  z-index:3;
  margin-top:-40px;
  padding-bottom:40px;
}
.quick-links .container-custom{
  display:flex;gap:12px;flex-wrap:wrap;
}
.quick-link-item{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;border-radius:12px;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(12px);
  color:var(--text-secondary);
  font-size:14px;font-weight:500;
  transition:all .25s ease;
  cursor:pointer;
}
.quick-link-item i{color:var(--accent-cyan);font-size:14px}
.quick-link-item:hover{
  background:rgba(255,255,255,0.1);
  border-color:var(--accent-cyan);
  color:var(--text-primary);
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(0,0,0,0.2);
}

.section-block{padding:80px 0}
.section-block.alt-bg{background:var(--bg-secondary)}
.section-heading{margin-bottom:48px}
.section-heading .section-index{
  font-size:14px;color:var(--text-weak);
  letter-spacing:0.1em;margin-bottom:6px;
}
.section-heading h2{
  font-size:30px;font-weight:700;
  margin-bottom:12px;
}
.section-heading p{
  font-size:16px;color:var(--text-secondary);
  max-width:640px;
}

.steps-flow{
  display:flex;align-items:center;gap:0;
  position:relative;
  justify-content:space-between;
}
.step-item{
  flex:1;text-align:center;
  position:relative;
  padding:0 20px;
}
.step-node{
  width:64px;height:64px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand-purple),#9c7dff);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 20px;
  font-size:20px;font-weight:800;color:#fff;
  box-shadow:0 8px 24px rgba(124,92,255,0.35);
  position:relative;z-index:2;
}
.step-item:not(:last-child)::after{
  content:'';
  position:absolute;top:32px;left:calc(50% + 40px);right:calc(-50% + 40px);
  height:2px;
  background:linear-gradient(90deg,rgba(124,92,255,0.5),rgba(0,229,195,0.5));
  border:1px dashed rgba(124,92,255,0.3);
  z-index:1;
}
.step-item h3{font-size:18px;font-weight:600;margin-bottom:8px}
.step-item p{font-size:14px;color:var(--text-secondary);line-height:1.6;max-width:220px;margin:0 auto}

.news-list-container{}
.news-row{
  display:flex;align-items:center;gap:20px;
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  padding:16px 18px;
  margin-bottom:12px;
  transition:all .3s ease;
}
.news-row:hover{
  background:var(--glass-bg-hover);
  border-color:rgba(0,229,195,0.4);
  transform:translateY(-4px);
  box-shadow:var(--shadow-card);
}
.news-thumb{
  width:96px;height:72px;border-radius:10px;overflow:hidden;flex-shrink:0;
  background:var(--bg-secondary);
}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{flex:1;min-width:0}
.news-body h4{
  font-size:16px;font-weight:600;margin-bottom:6px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.news-body h4 a{color:var(--text-primary);transition:color .2s}
.news-body h4 a:hover{color:var(--accent-cyan)}
.news-body p{
  font-size:14px;color:var(--text-secondary);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  margin-bottom:6px;
}
.news-category{
  display:inline-block;
  background:rgba(255,182,72,0.15);
  border:1px solid rgba(255,182,72,0.3);
  color:var(--accent-amber);
  font-size:12px;font-weight:500;
  padding:2px 10px;border-radius:4px;
}
.news-meta{
  display:flex;align-items:center;gap:14px;flex-shrink:0;
}
.news-meta time{
  font-size:13px;color:var(--text-weak);
}
.news-meta a{
  width:34px;height:34px;border-radius:8px;
  background:rgba(255,255,255,0.06);
  border:1px solid var(--glass-border);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-secondary);
  font-size:13px;
  transition:all .25s;
}
.news-meta a:hover{
  background:var(--accent-cyan);
  color:#0B1021;
  border-color:var(--accent-cyan);
}
.empty-state{
  border:1px dashed rgba(255,255,255,0.15);
  border-radius:var(--radius-glass);
  padding:48px 20px;
  text-align:center;
  background:rgba(255,255,255,0.02);
}
.empty-state i{
  font-size:36px;color:var(--text-weak);
  margin-bottom:12px;
}
.empty-state p{
  font-size:15px;color:var(--text-secondary);
}
.view-more-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--accent-cyan);font-size:14px;font-weight:500;
  margin-top:16px;transition:gap .2s;
}
.view-more-link:hover{gap:10px}

.case-wrap{
  display:flex;gap:24px;margin-bottom:24px;
  align-items:stretch;
}
.case-main{
  flex:1.4;border-radius:var(--radius-glass);
  overflow:hidden;position:relative;
  border:1px solid var(--glass-border);
  min-height:300px;
  background:var(--bg-secondary);
}
.case-main img{
  width:100%;height:100%;object-fit:cover;
}
.case-main .overlay{
  position:absolute;inset:0;
  background:linear-gradient(to top, rgba(11,16,33,0.9), rgba(11,16,33,0.2));
  display:flex;align-items:flex-end;padding:24px;
}
.case-main .case-label{
  font-size:13px;color:var(--accent-cyan);
  margin-bottom:4px;
}
.case-main h3{font-size:20px;color:var(--text-primary);margin-bottom:6px}
.case-main p{font-size:14px;color:var(--text-secondary)}
.case-stats{
  flex:1;display:flex;flex-direction:column;gap:16px;
  justify-content:center;
}
.stat-block{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  padding:20px 24px;
  backdrop-filter:blur(12px);
  transition:all .25s;
}
.stat-block:hover{
  border-color:rgba(0,229,195,0.4);
  transform:translateY(-2px);
}
.stat-number{
  font-size:36px;font-weight:700;
  color:var(--accent-cyan);
  line-height:1.1;
  margin-bottom:4px;
}
.stat-block:nth-child(2) .stat-number{color:var(--accent-amber)}
.stat-label{font-size:14px;color:var(--text-secondary)}
.case-cards-row{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;
}
.case-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  overflow:hidden;
  backdrop-filter:blur(12px);
  transition:all .3s ease;
}
.case-card:hover{
  border-color:rgba(0,229,195,0.4);
  transform:translateY(-4px);
  box-shadow:var(--shadow-card);
}
.case-card img{width:100%;height:160px;object-fit:cover}
.case-card .case-card-body{padding:20px}
.case-card h4{font-size:16px;font-weight:600;margin-bottom:8px}
.case-card p{font-size:14px;color:var(--text-secondary);margin-bottom:12px}

.faq-wrap{
  display:grid;grid-template-columns:1fr 1.2fr;gap:48px;
  align-items:start;
}
.faq-intro h2{font-size:30px;font-weight:700;margin-bottom:16px}
.faq-intro p{font-size:16px;color:var(--text-secondary)}
.faq-list .faq-item{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  margin-bottom:10px;
  overflow:hidden;
  transition:all .3s ease;
}
.faq-list .faq-item.active{
  border-color:rgba(0,229,195,0.4);
  box-shadow:0 0 20px rgba(0,229,195,0.1);
}
.faq-item .faq-question{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 22px;cursor:pointer;
  font-size:15px;font-weight:500;color:var(--text-primary);
  user-select:none;
}
.faq-item .faq-question .faq-icon{
  width:24px;height:24px;border-radius:50%;
  background:rgba(255,255,255,0.06);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--text-secondary);
  transition:all .3s;
  flex-shrink:0;
}
.faq-item.active .faq-question .faq-icon{
  background:var(--accent-cyan);
  color:#0B1021;
  transform:rotate(45deg);
}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .35s ease;
}
.faq-item.active .faq-answer{
  max-height:300px;
}
.faq-answer p{
  padding:0 22px 18px;
  font-size:14px;color:var(--text-secondary);
  line-height:1.7;
}

.cta-panel{
  position:relative;
  border-radius:var(--radius-glass);
  padding:56px 40px;
  text-align:center;
  overflow:hidden;
  background:var(--bg-secondary);
  border:1px solid var(--glass-border);
}
.cta-panel::before{
  content:'';
  position:absolute;top:-40%;left:50%;transform:translateX(-50%);
  width:600px;height:600px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,92,255,0.25) 0%,rgba(0,229,195,0.08) 45%,transparent 70%);
  pointer-events:none;
}
.cta-panel .cta-content{position:relative;z-index:2}
.cta-panel h2{font-size:30px;font-weight:700;margin-bottom:12px}
.cta-panel>p{font-size:16px;color:var(--text-secondary);margin-bottom:28px;max-width:520px;margin-left:auto;margin-right:auto}
.cta-form{
  display:flex;gap:12px;justify-content:center;flex-wrap:wrap;
  max-width:520px;margin:0 auto;
}
.cta-form input[type="tel"]{
  flex:1;min-width:200px;
  height:48px;padding:0 18px;
  background:rgba(0,0,0,0.3);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius-btn);
  color:var(--text-primary);font-size:15px;
  transition:all .25s;
}
.cta-form input[type="tel"]:focus{
  outline:none;border-color:var(--accent-cyan);
  box-shadow:0 0 0 3px rgba(0,229,195,0.15);
}
.cta-form input[type="tel"]::placeholder{color:var(--text-weak)}
.btn-code{
  height:48px;padding:0 20px;border-radius:var(--radius-btn);
  background:rgba(255,255,255,0.06);
  border:1px solid var(--glass-border);
  color:var(--text-primary);font-size:14px;cursor:pointer;
  transition:all .25s;
  white-space:nowrap;
}
.btn-code:hover{
  background:rgba(255,255,255,0.12);
  border-color:var(--accent-cyan);
  color:var(--accent-cyan);
}
.btn-submit{
  height:48px;padding:0 32px;border-radius:var(--radius-btn);
  background:linear-gradient(135deg,var(--accent-cyan),#00bcd4);
  color:#0B1021;font-weight:700;font-size:15px;border:none;
  cursor:pointer;transition:all .25s;
  box-shadow:var(--glow-cyan);
}
.btn-submit:hover{
  filter:brightness(1.1);
  box-shadow:0 0 36px rgba(0,229,195,0.55);
  transform:translateY(-2px);
}

.site-footer{
  background:var(--bg-deep);
  border-top:1px solid rgba(255,255,255,0.06);
  padding:60px 0 0;
  margin-top:auto;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-logo{width:36px;height:36px;font-size:16px;border-radius:10px}
.footer-brand .brand-text{font-size:16px}
.footer-desc{
  font-size:14px;color:var(--text-secondary);
  line-height:1.7;max-width:280px;
}
.footer-title{
  font-size:14px;color:var(--text-weak);
  margin-bottom:16px;letter-spacing:0.04em;
}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:10px}
.footer-links a{
  font-size:14px;color:var(--text-secondary);
  transition:color .2s;
}
.footer-links a:hover{color:var(--accent-cyan)}
.footer-contact-item{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--text-secondary);
  margin-bottom:10px;
}
.footer-contact-item i{color:var(--accent-cyan);font-size:13px;width:16px;text-align:center}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.05);
  padding:20px 0;
  text-align:center;
  font-size:13px;color:var(--text-weak);
}

@media (max-width:1199px){
  :root{
    --sidebar-w:200px;
  }
  .hero-title{font-size:44px}
  .faq-wrap{grid-template-columns:1fr;gap:32px}
}
@media (max-width:991px){
  .sidebar{display:none}
  .mobile-header{display:flex}
  .main-wrapper{margin-left:0}
  .section-block{padding:64px 0}
  .case-wrap{flex-direction:column}
  .case-stats{flex-direction:row}
  .stat-block{flex:1}
  .steps-flow{flex-direction:column;gap:32px;align-items:stretch;padding-left:32px}
  .step-item{text-align:left;padding-left:24px}
  .step-item:not(:last-child)::after{
    left:0;right:auto;top:-32px;bottom:-32px;
    width:2px;height:auto;
    background:linear-gradient(180deg,rgba(124,92,255,0.5),rgba(0,229,195,0.5));
    border-left:1px dashed rgba(124,92,255,0.3);
    border:none;
  }
  .step-node{margin:0 0 16px;width:52px;height:52px;font-size:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hero-title{font-size:36px}
  .hero-section{min-height:520px}
  .container-custom{padding:0 var(--content-pad-md)}
}
@media (max-width:767px){
  .case-stats{flex-direction:column}
  .case-cards-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .section-block{padding:48px 0}
  .hero-title{font-size:32px}
  .hero-section{min-height:420px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn-primary-custom,.hero-btns .btn-secondary-custom{width:100%;justify-content:center}
  .news-row{flex-wrap:wrap;padding:14px}
  .news-thumb{width:60px;height:60px}
  .news-body h4{font-size:14px}
  .news-body p{font-size:13px}
  .news-meta{width:100%;justify-content:flex-end;padding-top:8px;border-top:1px solid rgba(255,255,255,0.05)}
  .cta-panel{padding:40px 20px}
  .cta-form{flex-direction:column}
  .cta-form input,.cta-form .btn-code,.cta-form .btn-submit{width:100%}
  .container-custom{padding:0 var(--content-pad-sm)}
  .section-heading h2{font-size:24px}
  .stat-number{font-size:28px}
  .faq-item .faq-question{font-size:14px;padding:16px 16px}
  .faq-answer p{padding:0 16px 16px;font-size:13px}
}
@media (max-width:575px){
  .hero-title{font-size:28px;line-height:1.2}
  .hero-subtitle{font-size:15px}
  .step-node{width:46px;height:46px;font-size:16px}
  .quick-link-item{padding:10px 16px;font-size:13px}
  .case-main{min-height:200px}
  .case-main .overlay{padding:16px}
  .case-main h3{font-size:17px}
  .case-card img{height:120px}
  .section-block{padding:40px 0}
  .cta-panel{padding:32px 16px}
  .cta-panel h2{font-size:22px}
}

/* roulang page: category1 */
:root {
      --bg-primary: #0B1021;
      --bg-secondary: #0E1530;
      --bg-deeper: #080B17;
      --glass-bg: rgba(255, 255, 255, 0.04);
      --glass-bg-hover: rgba(255, 255, 255, 0.08);
      --glass-border: rgba(255, 255, 255, 0.12);
      --primary: #7C5CFF;
      --accent: #00E5C3;
      --amber: #FFB648;
      --text-main: #E8EAF6;
      --text-secondary: #A7ADCC;
      --text-weak: #667095;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 20px;
      --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.25);
      --spacing-section: 80px;
      --font-stack: "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition-base: all 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

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

    button,
    input {
      font-family: inherit;
      font-size: inherit;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
      position: relative;
    }

    .section-index {
      font-size: 14px;
      letter-spacing: 0.08em;
      color: var(--text-weak);
      font-weight: 600;
      display: block;
      margin-bottom: 8px;
    }

    .section-heading {
      margin-bottom: 40px;
    }

    .section-heading h2 {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.01em;
      margin-bottom: 12px;
    }

    .section-heading p {
      color: var(--text-secondary);
      max-width: 640px;
      font-size: 16px;
    }

    /* ===== Desktop Sidebar ===== */
    .side-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 240px;
      height: 100vh;
      background: rgba(8, 12, 24, 0.92);
      border-right: 1px solid rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      padding: 24px 16px 20px;
      z-index: 1050;
      display: flex;
      flex-direction: column;
      overflow-y: auto;
    }

    .side-nav::-webkit-scrollbar {
      width: 4px;
    }
    .side-nav::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.15);
      border-radius: 4px;
    }

    .side-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 4px 8px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      margin-bottom: 20px;
    }

    .brand-logo {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #9D7BFF);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      box-shadow: 0 0 20px rgba(124, 92, 255, 0.4);
      flex-shrink: 0;
    }

    .brand-text {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: 0.02em;
      white-space: nowrap;
    }

    .nav-group-title {
      font-size: 12px;
      color: var(--text-weak);
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 0 12px;
      margin-bottom: 8px;
    }

    .side-nav .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 44px;
      padding: 0 14px;
      border-radius: 10px;
      color: var(--text-secondary);
      font-size: 15px;
      font-weight: 500;
      margin-bottom: 4px;
      position: relative;
      transition: var(--transition-base);
    }

    .side-nav .nav-link i {
      width: 18px;
      text-align: center;
      font-size: 15px;
    }

    .side-nav .nav-link:hover {
      color: var(--text-main);
      background: var(--glass-bg);
    }

    .side-nav .nav-link:hover::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 18px;
      background: var(--accent);
      border-radius: 2px;
      box-shadow: 0 0 8px rgba(0, 229, 195, 0.6);
    }

    .side-nav .nav-link.active {
      background: rgba(124, 92, 255, 0.15);
      color: #fff;
    }

    .side-nav .nav-link.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 24px;
      background: var(--accent);
      border-radius: 2px;
      box-shadow: 0 0 10px rgba(0, 229, 195, 0.7);
    }

    .side-nav-cta {
      margin-top: auto;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    /* ===== Mobile Topbar ===== */
    .mobile-navbar {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 64px;
      background: rgba(8, 12, 24, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      z-index: 1060;
      padding: 0 16px;
      align-items: center;
      justify-content: space-between;
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .mobile-toggle {
      width: 44px;
      height: 44px;
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-main);
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition-base);
    }

    .mobile-toggle:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      background: rgba(8, 12, 24, 0.98);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 16px;
      z-index: 1055;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }

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

    .mobile-menu .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 44px;
      padding: 0 14px;
      border-radius: 10px;
      color: var(--text-secondary);
      font-size: 15px;
      font-weight: 500;
      margin-bottom: 4px;
      transition: var(--transition-base);
    }

    .mobile-menu .nav-link:hover,
    .mobile-menu .nav-link.active {
      color: var(--text-main);
      background: rgba(124, 92, 255, 0.15);
    }

    .mobile-menu .nav-link.active {
      border-left: 3px solid var(--accent);
    }

    /* ===== Main Layout ===== */
    .main-content {
      margin-left: 240px;
      min-height: 100vh;
      background: var(--bg-primary);
    }

    /* ===== Category Hero ===== */
    .category-hero {
      position: relative;
      min-height: 320px;
      display: flex;
      align-items: center;
      overflow: hidden;
      padding: 80px 0 60px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .category-hero .container-custom {
      z-index: 2;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      z-index: 0;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(to bottom, rgba(11, 16, 33, 0.55) 0%, rgba(11, 16, 33, 0.82) 100%);
      z-index: 1;
    }

    .breadcrumb-custom {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-weak);
      margin-bottom: 20px;
      flex-wrap: wrap;
    }

    .breadcrumb-custom a {
      color: var(--text-secondary);
    }

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

    .breadcrumb-custom .sep {
      font-size: 11px;
      color: var(--text-weak);
    }

    .breadcrumb-custom span:last-child {
      color: var(--accent);
    }

    .category-hero h1 {
      font-size: 44px;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 16px;
      background: linear-gradient(135deg, #A8B4FF 0%, var(--primary) 40%, var(--accent) 100%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      color: var(--text-secondary);
      font-size: 17px;
      max-width: 640px;
      line-height: 1.8;
    }

    /* ===== Overview Cards ===== */
    .overview-section {
      padding: var(--spacing-section) 0;
    }

    .overview-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 24px;
    }

    .overview-row:last-child {
      margin-bottom: 0;
    }

    .feature-card {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      min-height: 220px;
      transition: var(--transition-base);
      box-shadow: var(--shadow-card);
      position: relative;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      inset: 0 0 auto 0;
      height: 1px;
      background: rgba(255, 255, 255, 0.08);
      pointer-events: none;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 229, 195, 0.45);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 30px rgba(0, 229, 195, 0.08);
      background: var(--glass-bg-hover);
    }

    .feature-image {
      width: 42%;
      flex-shrink: 0;
      overflow: hidden;
      position: relative;
    }

    .feature-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .feature-card:hover .feature-image img {
      transform: scale(1.04);
    }

    .feature-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, transparent 70%, rgba(11, 16, 33, 0.35) 100%);
    }

    .feature-body {
      padding: 28px 24px;
      display: flex;
      flex-direction: column;
    }

    .card-tag {
      display: inline-flex;
      align-items: center;
      align-self: flex-start;
      padding: 4px 12px;
      background: rgba(255, 182, 72, 0.12);
      border: 1px solid rgba(255, 182, 72, 0.35);
      color: var(--amber);
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      letter-spacing: 0.02em;
    }

    .feature-body h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--text-main);
      margin: 14px 0 10px;
      line-height: 1.4;
    }

    .feature-body p {
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.7;
      flex-grow: 1;
    }

    .card-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--accent);
      font-weight: 600;
      font-size: 14px;
      margin-top: 16px;
    }

    .card-link:hover {
      color: var(--text-main);
    }

    .card-link i {
      transition: transform 0.25s ease;
    }

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

    /* ===== Scenario Section ===== */
    .scenario-section {
      padding: var(--spacing-section) 0;
      background: var(--bg-secondary);
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

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

    .scenario-item {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      align-items: flex-start;
      gap: 18px;
      transition: var(--transition-base);
      position: relative;
      box-shadow: var(--shadow-card);
    }

    .scenario-item:hover {
      transform: translateY(-4px);
      border-color: rgba(124, 92, 255, 0.45);
      background: var(--glass-bg-hover);
    }

    .scenario-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #9D7BFF);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      flex-shrink: 0;
      box-shadow: 0 4px 18px rgba(124, 92, 255, 0.35);
    }

    .scenario-item h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

    /* ===== Process Section ===== */
    .process-section {
      padding: var(--spacing-section) 0;
    }

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

    .process-steps::before {
      content: '';
      position: absolute;
      top: 32px;
      left: 8%;
      right: 8%;
      height: 1px;
      background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
      opacity: 0.4;
      z-index: 0;
    }

    .process-step {
      text-align: center;
      position: relative;
      z-index: 1;
      padding: 0 8px;
    }

    .step-num {
      width: 64px;
      height: 64px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), #4B3ACB);
      border: 2px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      font-size: 20px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 24px rgba(124, 92, 255, 0.35);
      position: relative;
    }

    .step-num::after {
      content: '';
      position: absolute;
      inset: -4px;
      border-radius: 50%;
      border: 1px solid rgba(124, 92, 255, 0.25);
      pointer-events: none;
    }

    .process-step h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .process-step p {
      color: var(--text-secondary);
      font-size: 14px;
      line-height: 1.65;
      max-width: 220px;
      margin: 0 auto;
    }

    /* ===== FAQ Section ===== */
    .faq-section {
      padding: var(--spacing-section) 0;
      background: var(--bg-secondary);
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .faq-layout {
      display: grid;
      grid-template-columns: 0.8fr 1.4fr;
      gap: 48px;
      align-items: start;
    }

    .faq-intro h2 {
      font-size: 30px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .faq-intro p {
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.75;
    }

    .accordion-item {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border) !important;
      border-radius: 14px !important;
      margin-bottom: 10px;
      overflow: hidden;
      transition: var(--transition-base);
    }

    .accordion-item:last-child {
      margin-bottom: 0;
    }

    .accordion-item:hover {
      border-color: rgba(0, 229, 195, 0.3) !important;
    }

    .accordion-button {
      background: transparent;
      color: var(--text-main);
      font-size: 16px;
      font-weight: 500;
      padding: 18px 22px;
      box-shadow: none !important;
      transition: var(--transition-base);
    }

    .accordion-button:not(.collapsed) {
      background: rgba(0, 229, 195, 0.06);
      color: var(--accent);
    }

    .accordion-button:focus {
      box-shadow: none;
      outline: 2px solid rgba(0, 229, 195, 0.4);
      outline-offset: -2px;
    }

    .accordion-button::after {
      background-image: none;
      content: '\f078';
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      color: var(--text-secondary);
      width: auto;
      height: auto;
      transition: transform 0.3s ease;
    }

    .accordion-button:not(.collapsed)::after {
      transform: rotate(180deg);
      color: var(--accent);
    }

    .accordion-body {
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.75;
      padding: 0 22px 18px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
    }

    /* ===== CTA Section ===== */
    .cta-section {
      padding: var(--spacing-section) 0;
    }

    .cta-panel {
      max-width: 960px;
      margin: 0 auto;
      background: radial-gradient(circle at 20% 20%, rgba(124, 92, 255, 0.22), transparent 50%),
                  radial-gradient(circle at 80% 80%, rgba(0, 229, 195, 0.16), transparent 50%),
                  var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      text-align: center;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
    }

    .cta-panel::before {
      content: '';
      position: absolute;
      inset: 0 0 auto 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    }

    .cta-panel h2 {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }

    .cta-panel p {
      color: var(--text-secondary);
      font-size: 16px;
      max-width: 520px;
      margin: 0 auto 32px;
    }

    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 0 28px;
      height: 50px;
      border-radius: var(--radius-sm);
      font-size: 16px;
      font-weight: 600;
      border: none;
      transition: var(--transition-base);
    }

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

    .btn-accent {
      background: linear-gradient(135deg, #00E5C3, #00C9A7);
      color: #0B1021;
      box-shadow: 0 0 24px rgba(0, 229, 195, 0.4);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 40px rgba(0, 229, 195, 0.55);
      color: #0B1021;
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--glass-border);
      color: var(--text-main);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(0, 229, 195, 0.5);
      color: var(--accent);
      transform: translateY(-2px);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--bg-deeper);
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 60px 0 0;
      margin-left: 240px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 40px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
    }

    .footer-brand .brand-logo {
      width: 36px;
      height: 36px;
      font-size: 17px;
      border-radius: 10px;
    }

    .footer-brand .brand-text {
      font-size: 17px;
    }

    .footer-desc {
      color: var(--text-weak);
      font-size: 14px;
      line-height: 1.7;
      max-width: 280px;
    }

    .footer-title {
      font-size: 14px;
      color: var(--text-weak);
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 0.06em;
    }

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

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

    .footer-links a {
      color: var(--text-secondary);
      font-size: 14px;
    }

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

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-secondary);
      font-size: 14px;
      margin-bottom: 12px;
    }

    .footer-contact-item i {
      color: var(--primary);
      width: 16px;
      text-align: center;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      color: var(--text-weak);
      font-size: 13px;
    }

    /* ===== Responsive Breakpoints ===== */
    @media (min-width: 1200px) {
      .container-custom {
        padding-left: 60px;
        padding-right: 60px;
      }
    }

    @media (min-width: 992px) and (max-width: 1199px) {
      .side-nav {
        width: 200px;
      }
      .main-content {
        margin-left: 200px;
      }
      .site-footer {
        margin-left: 200px;
      }
      .category-hero h1 {
        font-size: 38px;
      }
      .feature-body {
        padding: 20px 18px;
      }
    }

    @media (max-width: 991px) {
      .side-nav {
        display: none;
      }
      .main-content {
        margin-left: 0;
        padding-top: 64px;
      }
      .site-footer {
        margin-left: 0;
      }
      .mobile-navbar {
        display: flex;
      }
      .category-hero {
        min-height: 280px;
        padding: 56px 0 44px;
      }
      .category-hero h1 {
        font-size: 34px;
      }
      .overview-row {
        grid-template-columns: 1fr;
      }
      .feature-card {
        flex-direction: row;
      }
      .feature-image {
        width: 38%;
      }
      .scenario-grid {
        grid-template-columns: 1fr 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr 1fr;
        gap: 36px 20px;
      }
      .process-steps::before {
        display: none;
      }
      .process-step {
        padding: 0;
      }
      .faq-layout {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 767px) {
      :root {
        --spacing-section: 56px;
      }
      .container-custom {
        padding-left: 20px;
        padding-right: 20px;
      }
      .category-hero {
        min-height: 240px;
        padding: 44px 0 36px;
      }
      .category-hero h1 {
        font-size: 28px;
      }
      .hero-lead {
        font-size: 15px;
      }
      .section-heading h2 {
        font-size: 24px;
      }
      .overview-row {
        gap: 16px;
      }
      .feature-card {
        flex-direction: column;
      }
      .feature-image {
        width: 100%;
        height: 180px;
      }
      .feature-body {
        padding: 20px;
      }
      .scenario-item {
        flex-direction: column;
        padding: 20px;
      }
      .scenario-icon {
        margin-bottom: 4px;
      }
      .cta-panel {
        padding: 40px 20px;
      }
      .cta-panel h2 {
        font-size: 24px;
      }
      .cta-actions {
        flex-direction: column;
        align-items: center;
      }
      .btn {
        width: 100%;
        justify-content: center;
      }
    }

    @media (max-width: 575px) {
      .container-custom {
        padding-left: 16px;
        padding-right: 16px;
      }
      .category-hero {
        min-height: 200px;
        padding: 36px 0 30px;
      }
      .category-hero h1 {
        font-size: 24px;
      }
      .breadcrumb-custom {
        font-size: 13px;
        margin-bottom: 14px;
      }
      .overview-section,
      .scenario-section,
      .process-section,
      .faq-section,
      .cta-section {
        padding-top: 48px;
        padding-bottom: 48px;
      }
      .scenario-grid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .process-step {
        display: flex;
        align-items: center;
        gap: 14px;
        text-align: left;
      }
      .step-num {
        margin: 0;
        width: 52px;
        height: 52px;
        flex-shrink: 0;
        font-size: 17px;
      }
      .process-step h3 {
        margin-bottom: 2px;
      }
      .process-step p {
        margin: 0;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }

/* roulang page: article */
:root {
  --bg-main: #0B1021;
  --bg-secondary: #0E1530;
  --bg-deep: #080B17;
  --bg-nav: rgba(8, 12, 24, 0.9);
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-hover: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  --brand-purple: #7C5CFF;
  --brand-purple-soft: rgba(124, 92, 255, 0.15);
  --action-cyan: #00E5C3;
  --accent-amber: #FFB648;
  --text-primary: #E8EAF6;
  --text-secondary: #A7ADCC;
  --text-weak: #667095;
  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-sm: 10px;
  --radius-xs: 8px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.25);
  --glow-cyan: 0 0 24px rgba(0, 229, 195, 0.4);
  --font-stack: "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --nav-width: 240px;
  --transition: 0.25s ease;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-main);
  background-image: radial-gradient(ellipse 800px 500px at 85% -10%, rgba(124, 92, 255, 0.10), transparent), radial-gradient(ellipse 600px 400px at 5% 110%, rgba(0, 229, 195, 0.06), transparent);
  background-attachment: fixed;
  margin: 0;
  padding: 0;
  min-height: 100vh;
}
a { color: var(--text-secondary); text-decoration: none; transition: color 0.25s ease; }
a:hover { color: var(--action-cyan); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; }

/* ===== 侧边导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--bg-nav);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1050;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
}
.side-nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px;
  margin-bottom: 28px;
}
.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-purple), var(--action-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 22px;
  color: #fff;
  box-shadow: 0 4px 14px rgba(124, 92, 255, 0.4);
  flex-shrink: 0;
  line-height: 1;
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.side-nav-body { flex: 1; overflow-y: auto; }
.nav-group-title {
  font-size: 12px;
  color: var(--text-weak);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 12px;
  margin-bottom: 8px;
  user-select: none;
}
.side-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 15px;
  text-decoration: none;
  transition: all var(--transition);
  position: relative;
  margin-bottom: 2px;
}
.side-nav .nav-link i {
  width: 18px;
  text-align: center;
  font-size: 15px;
  color: var(--text-weak);
  transition: color var(--transition);
}
.side-nav .nav-link:hover { color: var(--text-primary); background: var(--glass-bg); }
.side-nav .nav-link:hover::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 18px;
  border-radius: 2px;
  background: var(--action-cyan);
}
.side-nav .nav-link.active { background: var(--brand-purple-soft); color: var(--text-primary); }
.side-nav .nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 18px;
  border-radius: 2px;
  background: var(--action-cyan);
}
.side-nav .nav-link.active i { color: var(--action-cyan); }
.side-nav-footer {
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.btn-cta-nav {
  display: block;
  width: 100%;
  padding: 12px 16px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--action-cyan), #00B8D9);
  color: #062622;
  font-weight: 700;
  font-size: 15px;
  text-align: center;
  text-decoration: none;
  box-shadow: var(--glow-cyan);
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}
.btn-cta-nav:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 32px rgba(0, 229, 195, 0.55);
  color: #031310;
}

/* ===== 移动端顶部导航 ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1040;
  background: rgba(8, 12, 24, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 12px 16px;
}
.mobile-header .navbar { padding: 0; }
.mobile-header .navbar-brand { display: flex; align-items: center; gap: 10px; margin: 0; padding: 0; }
.mobile-header .btn-cta-nav { margin-top: 12px; }
.mobile-header .navbar-toggler {
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 6px 10px;
  background: transparent;
  box-shadow: none;
}
.mobile-header .navbar-toggler:hover { border-color: rgba(0, 229, 195, 0.5); }
.mobile-header .navbar-toggler:focus {
  outline: 2px solid var(--action-cyan);
  outline-offset: 2px;
  box-shadow: none;
}
.mobile-header .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28232,234,246,0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  width: 1.2em;
  height: 1.2em;
}
.mobile-header .navbar-collapse { background: var(--bg-nav); border-top: 1px solid rgba(255, 255, 255, 0.06); margin-top: 12px; }
.mobile-nav-panel { padding: 16px 8px 8px; }
.mobile-nav-link {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  transition: all var(--transition);
  border-left: 3px solid transparent;
}
.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--text-primary);
  background: var(--brand-purple-soft);
  border-left-color: var(--action-cyan);
}
.mobile-nav-divider {
  font-size: 12px;
  color: var(--text-weak);
  padding: 12px 14px 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  user-select: none;
}

/* ===== 主内容布局 ===== */
.main-wrapper {
  margin-left: var(--nav-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: transparent;
}
.main-content {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 60px;
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.breadcrumb-bar a { color: var(--text-secondary); text-decoration: none; transition: color var(--transition); }
.breadcrumb-bar a:hover { color: var(--action-cyan); }
.breadcrumb-bar .sep { font-size: 11px; color: var(--text-weak); }
.breadcrumb-bar .current {
  color: var(--text-secondary);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 文章英雄区 ===== */
.article-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 36px 32px 28px;
  margin-bottom: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  z-index: 0;
}
.article-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(rgba(11, 16, 33, 0.55), rgba(11, 16, 33, 0.92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.article-hero .breadcrumb-bar { margin-bottom: 20px; color: rgba(167, 173, 204, 0.8); }
.article-hero h1 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
  max-width: 820px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 14px;
  color: var(--text-secondary);
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-item i { color: var(--text-weak); }
.meta-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(255, 182, 72, 0.15);
  border: 1px solid rgba(255, 182, 72, 0.3);
  color: var(--accent-amber);
  font-size: 13px;
}

/* ===== 正文 ===== */
.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
}
.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 42px 0 18px;
  line-height: 1.4;
}
.article-content h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 0.9em;
  background: var(--brand-purple);
  border-radius: 2px;
  margin-right: 10px;
  vertical-align: -0.08em;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 32px 0 14px;
  line-height: 1.5;
}
.article-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 26px 0 12px;
}
.article-content p { margin-bottom: 20px; }
.article-content a { color: var(--action-cyan); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: #fff; text-decoration: none; }
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 28px 0;
  box-shadow: var(--shadow-card);
}
.article-content blockquote {
  border-left: 4px solid var(--action-cyan);
  background: rgba(0, 229, 195, 0.06);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: var(--text-secondary);
}
.article-content ul, .article-content ol {
  padding-left: 24px;
  margin-bottom: 20px;
}
.article-content li { margin-bottom: 8px; }
.article-content ul li::marker { color: var(--action-cyan); }
.article-content ol li::marker { color: var(--action-cyan); font-weight: 600; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  border-radius: 10px;
  overflow: hidden;
}
.article-content table th,
.article-content table td {
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px 14px;
  text-align: left;
}
.article-content table th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-weight: 600;
}
.article-content pre {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 18px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
  margin: 24px 0;
}
.article-content code {
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 5px;
  padding: 2px 6px;
  color: var(--action-cyan);
}
.article-content pre code { background: transparent; padding: 0; color: inherit; }

/* ===== 空态 ===== */
.empty-block {
  text-align: center;
  padding: 80px 24px;
  background: var(--glass-bg);
  border: 1px dashed var(--glass-border);
  border-radius: var(--radius-lg);
  margin-bottom: 40px;
}
.empty-block h1 { font-size: 28px; color: var(--text-primary); margin-bottom: 16px; }
.empty-block p { color: var(--text-secondary); margin-bottom: 24px; max-width: 420px; margin-left: auto; margin-right: auto; }
.empty-icon { font-size: 52px; color: var(--text-weak); margin-bottom: 20px; }

/* ===== 返回入口 ===== */
.article-back {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 760px;
  margin: 36px auto 0;
  padding: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-highlight);
}
.back-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition), transform var(--transition);
}
.back-link:hover { color: var(--action-cyan); transform: translateY(-1px); }

/* ===== 区块标题 ===== */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 28px;
}
.section-number {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-weak);
  letter-spacing: 0.04em;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}
.related-section { margin-top: 56px; }

/* ===== 相关推荐 ===== */
.related-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 24px;
}
.related-main-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  text-decoration: none;
  box-shadow: var(--glass-highlight), var(--shadow-card);
  transition: all var(--transition);
}
.related-main-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 195, 0.4);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 0 24px rgba(0, 229, 195, 0.14);
}
.related-main-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.related-main-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.related-main-card:hover .related-main-thumb img { transform: scale(1.04); }
.related-main-body { padding: 20px; }
.related-main-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.related-main-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.related-small-card {
  display: flex;
  gap: 14px;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-highlight);
  text-decoration: none;
  transition: all var(--transition);
  flex: 1;
}
.related-small-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 195, 0.4);
  background: var(--glass-bg-hover);
}
.related-small-card img {
  width: 96px;
  height: 72px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
}
.related-small-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 6px;
  line-height: 1.5;
}
.related-small-card span {
  font-size: 13px;
  color: var(--action-cyan);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  line-height: 1.5;
}
.btn-primary {
  background: linear-gradient(135deg, var(--action-cyan), #00B8D9);
  color: #062622;
  box-shadow: var(--glow-cyan);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 36px rgba(0, 229, 195, 0.6);
  color: #031310;
}
.btn-primary:focus-visible {
  outline: 2px solid var(--action-cyan);
  outline-offset: 3px;
}
.btn-ghost {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}
.btn-ghost:hover {
  border-color: var(--action-cyan);
  color: var(--action-cyan);
  box-shadow: 0 0 16px rgba(0, 229, 195, 0.15);
  transform: translateY(-2px);
}
.btn-lg { padding: 14px 32px; font-size: 16px; }

/* ===== CTA ===== */
.cta-panel {
  position: relative;
  overflow: hidden;
  margin-top: 56px;
  padding: 48px 32px;
  text-align: center;
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-highlight), var(--shadow-card);
  z-index: 0;
}
.cta-glow {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(ellipse at 20% 100%, rgba(124, 92, 255, 0.28), transparent 50%),
              radial-gradient(ellipse at 80% 0%, rgba(0, 229, 195, 0.18), transparent 50%);
}
.cta-panel h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.cta-panel p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 56px 0 24px;
  margin-top: 60px;
}
.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.footer-brand .brand-logo { width: 36px; height: 36px; font-size: 18px; border-radius: 10px; }
.footer-brand .brand-text { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}
.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-weak);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--action-cyan); }
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}
.footer-contact-item i { color: var(--text-weak); width: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-weak);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
  :root { --nav-width: 200px; }
  .main-content { padding: 32px 40px; }
  .article-content { max-width: 720px; }
  .article-hero h1 { font-size: 30px; }
}

@media (max-width: 991px) {
  :root { --nav-width: 0px; }
  .side-nav { display: none; }
  .mobile-header { display: block; }
  .main-wrapper { margin-left: 0; }
  .main-content { padding: 24px 20px; }
  .article-hero { padding: 28px 20px 24px; }
  .article-hero h1 { font-size: 26px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .section-head h2 { font-size: 24px; }
  .cta-panel h2 { font-size: 24px; }
}

@media (max-width: 575px) {
  .main-content { padding: 20px 16px; }
  .article-hero h1 { font-size: 22px; }
  .breadcrumb-bar .current { max-width: 180px; }
  .article-content { font-size: 16px; }
  .article-content h2 { font-size: 22px; }
  .article-back { flex-direction: column; gap: 14px; align-items: flex-start; }
  .related-small-card { padding: 10px; }
  .related-small-card img { width: 80px; height: 62px; }
  .related-main-body { padding: 16px; }
  .related-main-body h3 { font-size: 17px; }
  .cta-panel { padding: 40px 20px; }
  .cta-panel h2 { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
  .footer-bottom span { margin-left: 0 !important; }
}