/* roulang page: index */
:root {
  --c-primary: #7C3AED;
  --c-primary-strong: #8B5CF6;
  --c-accent: #06B6D4;
  --c-accent-soft: #22D3EE;
  --c-gold: #F59E0B;
  --c-bg: #0B0F19;
  --c-bg-soft: #111827;
  --c-card: #151A2A;
  --c-border: #1F2937;
  --c-text: #E5E7EB;
  --c-text-dim: #9CA3AF;
  --radius-card: 24px;
  --radius-btn: 12px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 24px rgba(124,58,237,0.25);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s}
button,input{font:inherit;border:none;outline:none;background:transparent;color:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.text-primary{color:var(--c-primary-strong)}
.text-accent{color:var(--c-accent)}
.text-gold{color:var(--c-gold)}

/* 按钮体系 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);
  font-size:14px;font-weight:600;
  padding:14px 28px;
  cursor:pointer;
  transition:all .3s ease;
  white-space:nowrap;
  border:1px solid transparent;
  line-height:1.2;
}
.btn-primary{
  background:linear-gradient(135deg,#7C3AED,#C026D3);
  color:#fff;
  box-shadow:0 4px 18px rgba(124,58,237,0.3);
}
.btn-primary:hover{
  filter:brightness(1.12);
  box-shadow:var(--shadow-glow),0 6px 20px rgba(192,38,211,0.3);
  transform:translateY(-2px);
}
.btn-primary:active{filter:brightness(0.96);transform:translateY(0)}
.btn-outline{
  background:rgba(6,182,212,0.06);
  border-color:var(--c-accent);
  color:var(--c-accent);
}
.btn-outline:hover{
  border-color:var(--c-accent-soft);
  color:var(--c-accent-soft);
  background:rgba(6,182,212,0.12);
  transform:translateY(-2px);
}
.btn-outline:active{transform:translateY(0)}
.btn-ghost{
  background:transparent;
  color:var(--c-text-dim);
  padding:10px 16px;
}
.btn-ghost:hover{color:var(--c-primary-strong)}
.btn-ghost .arrow{transition:transform .3s}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn-block{width:100%}
.btn-lg{padding:16px 36px;font-size:15px}

/* 标签 */
.tag{
  display:inline-block;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  line-height:1.4;
  background:rgba(124,58,237,0.14);
  color:var(--c-primary-strong);
}
.tag-gold{background:rgba(245,158,11,0.15);color:#FBBF24}
.tag-cyan{background:rgba(6,182,212,0.12);color:var(--c-accent-soft)}

/* 导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:64px;
  background:rgba(11,15,25,0.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .3s;
}
.site-header.scrolled{box-shadow:0 4px 24px rgba(0,0,0,0.4)}
.header-inner{
  height:64px;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(124,58,237,0.2),rgba(6,182,212,0.15));
  border:1px solid rgba(124,58,237,0.35);
  color:var(--c-accent);
}
.logo-text{font-size:18px;font-weight:700;color:#fff;letter-spacing:-0.01em}
.logo-text span{color:var(--c-primary-strong)}
.logo-badge{
  font-size:11px;font-weight:700;color:var(--c-gold);
  background:rgba(245,158,11,0.12);
  border:1px solid rgba(245,158,11,0.3);
  padding:2px 8px;border-radius:999px;
  letter-spacing:0.04em;
}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  font-size:14px;font-weight:500;color:var(--c-text-dim);
  padding:8px 16px;border-radius:999px;
  transition:all .3s;
}
.nav-link:hover{
  background:rgba(124,58,237,0.12);
  color:var(--c-text);
}
.nav-link.active{
  color:#fff;
  position:relative;
}
.nav-link.active::after{
  content:"";
  position:absolute;left:16px;right:16px;bottom:2px;
  height:2px;border-radius:2px;
  background:var(--c-primary-strong);
}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{
  position:relative;
  display:flex;align-items:center;
}
.search-box svg{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;color:var(--c-text-dim);
  pointer-events:none;
}
.search-box input{
  width:160px;
  background:var(--c-bg-soft);
  border:1px solid var(--c-border);
  border-radius:12px;
  padding:8px 12px 8px 36px;
  font-size:13px;
  color:var(--c-text);
  transition:border-color .3s,box-shadow .3s;
}
.search-box input::placeholder{color:var(--c-text-dim)}
.search-box input:focus{
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(124,58,237,0.25);
}
.login-link{
  font-size:14px;font-weight:500;color:var(--c-text-dim);
  padding:8px 4px;transition:color .3s;
}
.login-link:hover{color:var(--c-text)}
.mobile-toggle{
  display:none;
  padding:8px;
  border-radius:8px;
  color:var(--c-text);
}
.mobile-toggle:hover{background:rgba(255,255,255,0.06)}
.mobile-menu{
  display:none;
  position:fixed;top:64px;left:0;right:0;z-index:999;
  background:rgba(11,15,25,0.97);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-border);
  padding:16px 24px 24px;
  flex-direction:column;gap:8px;
}
.mobile-menu.open{display:flex}
.mobile-menu .nav-link{
  padding:12px 16px;
  font-size:15px;
  border-radius:12px;
}
.mobile-menu .nav-link.active{background:rgba(124,58,237,0.12)}
.mobile-menu .search-box{margin-bottom:8px}
.mobile-menu .search-box input{width:100%}
.mobile-menu .btn{width:100%;margin-top:4px}

/* Hero */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;
  padding:120px 0 80px;
  background:var(--c-bg);
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center center;
  opacity:0.4;
  pointer-events:none;
}
.hero-overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse at top right,rgba(124,58,237,0.28),transparent 55%),
    radial-gradient(ellipse at bottom left,rgba(6,182,212,0.16),transparent 50%),
    linear-gradient(180deg,transparent 0%,var(--c-bg) 100%);
  pointer-events:none;
}
.hero-inner{
  position:relative;z-index:2;
  display:flex;align-items:center;gap:60px;
}
.hero-content{flex:0 0 56%;max-width:640px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;
  color:var(--c-accent);
  background:rgba(6,182,212,0.08);
  border:1px solid rgba(6,182,212,0.2);
  padding:6px 16px;border-radius:999px;
  margin-bottom:24px;
  letter-spacing:0.03em;
}
.hero-h1{
  font-size:48px;font-weight:800;
  line-height:1.2;
  letter-spacing:-0.02em;
  color:#fff;
  margin-bottom:20px;
}
.hero-h1 .hl{color:var(--c-primary-strong)}
.hero-subtitle{
  font-size:17px;
  color:var(--c-text-dim);
  line-height:1.7;
  margin-bottom:32px;
  max-width:480px;
}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.hero-meta{
  display:flex;gap:24px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-dim);
}
.hero-meta span{display:flex;align-items:center;gap:6px}
.hero-meta svg{width:15px;height:15px;color:var(--c-accent)}
.hero-visual{flex:0 0 40%;max-width:420px}
.login-card-demo{
  background:rgba(21,26,42,0.9);
  border:1px solid var(--c-border);
  border-radius:20px;
  box-shadow:var(--shadow-card),0 0 60px rgba(124,58,237,0.12);
  overflow:hidden;
  backdrop-filter:blur(8px);
}
.login-card-demo .card-head{
  height:44px;
  display:flex;align-items:center;gap:8px;
  background:rgba(17,24,39,0.9);
  border-bottom:1px solid var(--c-border);
  padding:0 16px;
}
.login-card-demo .dot{width:10px;height:10px;border-radius:50%}
.login-card-demo .dot-r{background:#F87171}
.login-card-demo .dot-y{background:#FBBF24}
.login-card-demo .dot-g{background:#34D399}
.login-card-demo .card-body{padding:32px 28px 28px}
.demo-logo{
  font-size:22px;font-weight:800;color:#fff;
  text-align:center;margin-bottom:4px;
}
.demo-logo-sub{
  text-align:center;font-size:12px;color:var(--c-text-dim);
  letter-spacing:0.1em;margin-bottom:24px;
}
.demo-field{
  margin-bottom:16px;
}
.demo-field label{
  display:block;font-size:13px;font-weight:500;
  color:var(--c-text-dim);margin-bottom:6px;
}
.demo-field input{
  width:100%;
  background:var(--c-bg);
  border:1px solid var(--c-border);
  border-radius:12px;
  padding:11px 14px;
  font-size:14px;
  color:var(--c-text);
  transition:border-color .3s,box-shadow .3s;
}
.demo-field input:focus{
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(124,58,237,0.25);
}
.demo-field input::placeholder{color:var(--c-text-dim)}
.scroll-down{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:4px;
  color:var(--c-text-dim);font-size:12px;
  z-index:3;transition:color .3s;
}
.scroll-down:hover{color:var(--c-accent)}
.scroll-down svg{
  width:20px;height:20px;
  animation:bounceDown 2s infinite;
}
@keyframes bounceDown{
  0%,20%,50%,80%,100%{transform:translateY(0)}
  40%{transform:translateY(-6px)}
  60%{transform:translateY(-3px)}
}

/* 信任徽章条 */
.trust-bar{
  background:var(--c-bg-soft);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
  padding:28px 0;
}
.trust-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.trust-item{
  display:flex;align-items:center;gap:12px;
  padding:12px 16px;
  border-radius:16px;
  transition:background .3s;
}
.trust-item:hover{background:rgba(124,58,237,0.06)}
.trust-icon{
  width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(6,182,212,0.1);
  color:var(--c-accent);
  flex-shrink:0;
}
.trust-icon svg{width:20px;height:20px}
.trust-text{font-size:14px;font-weight:600;color:var(--c-text)}
.trust-text small{
  display:block;font-size:12px;font-weight:400;color:var(--c-text-dim);
  margin-top:2px;
}

/* 卖点三连 */
.features{
  padding:96px 0;
  background:var(--c-bg);
}
.section-head{
  text-align:center;
  margin-bottom:56px;
}
.section-eyebrow{
  display:inline-block;
  font-size:13px;font-weight:600;color:var(--c-accent);
  text-transform:uppercase;letter-spacing:0.08em;
  margin-bottom:12px;
}
.section-title{
  font-size:32px;font-weight:700;color:#fff;
  letter-spacing:-0.01em;
  margin-bottom:12px;
}
.section-desc{
  font-size:15px;color:var(--c-text-dim);
  max-width:560px;margin:0 auto;
  line-height:1.7;
}
.feature-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
}
.feature-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:28px;
  transition:transform .35s,border-color .35s,box-shadow .35s;
  position:relative;
  overflow:hidden;
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:var(--c-primary);
  box-shadow:var(--shadow-glow),var(--shadow-card);
}
.feature-card-large{
  grid-column:span 7;
  min-height:320px;
}
.feature-card-top{
  grid-column:span 5;
}
.feature-card-bottom{
  grid-column:span 5;
}
.feature-icon{
  width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
  background:rgba(6,182,212,0.1);
  color:var(--c-accent);
}
.feature-icon svg{width:24px;height:24px}
.feature-card h3{
  font-size:20px;font-weight:700;color:#fff;
  margin-bottom:12px;
}
.feature-card p{
  font-size:14px;color:var(--c-text-dim);
  line-height:1.7;
}
.feature-list{margin-top:12px}
.feature-list li{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--c-text-dim);
  padding:6px 0;
}
.feature-list li::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--c-accent);
  flex-shrink:0;
}
.badge-gold{
  position:absolute;top:20px;right:20px;
  font-size:12px;font-weight:700;
  color:var(--c-gold);
  background:rgba(245,158,11,0.1);
  border:1px solid rgba(245,158,11,0.3);
  padding:4px 12px;border-radius:999px;
}
.speed-lines{
  position:absolute;bottom:20px;right:20px;
  display:flex;gap:4px;align-items:flex-end;
}
.speed-lines span{
  width:3px;border-radius:2px;
  background:var(--c-accent);
  opacity:0.5;
  animation:pulseLine 1.5s ease-in-out infinite;
}
.speed-lines span:nth-child(1){height:12px}
.speed-lines span:nth-child(2){height:20px;animation-delay:0.2s}
.speed-lines span:nth-child(3){height:16px;animation-delay:0.4s}
.speed-lines span:nth-child(4){height:26px;animation-delay:0.6s}
.speed-lines span:nth-child(5){height:14px;animation-delay:0.8s}
@keyframes pulseLine{
  0%,100%{opacity:0.3;transform:scaleY(0.8)}
  50%{opacity:0.8;transform:scaleY(1.1)}
}
.device-icons{
  display:flex;gap:12px;margin-top:20px;
}
.device-icon{
  width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--c-border);
  display:flex;align-items:center;justify-content:center;
  color:var(--c-text-dim);
  transition:all .3s;
}
.device-icon:hover{color:var(--c-accent);border-color:var(--c-accent)}
.device-icon svg{width:20px;height:20px}

/* 场景演示 */
.demo-section{
  padding:96px 0;
  background:var(--c-bg-soft);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
}
.demo-grid{
  display:grid;grid-template-columns:5fr 7fr;gap:56px;
  align-items:center;
}
.demo-steps{position:relative;padding-left:8px}
.demo-step{
  position:relative;
  padding:0 0 32px 44px;
}
.demo-step:last-child{padding-bottom:0}
.demo-step::before{
  content:"";
  position:absolute;left:18px;top:44px;bottom:0;
  width:1px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
  opacity:0.3;
}
.demo-step:last-child::before{display:none}
.step-number{
  position:absolute;left:0;top:0;
  width:36px;height:36px;border-radius:50%;
  background:var(--c-card);
  border:1px solid var(--c-primary);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;
  color:var(--c-primary-strong);
  box-shadow:0 0 16px rgba(124,58,237,0.2);
}
.demo-step h3{
  font-size:17px;font-weight:600;color:#fff;
  margin-bottom:4px;
}
.demo-step p{
  font-size:14px;color:var(--c-text-dim);
  line-height:1.6;
}
.browser-window{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:16px;
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.browser-bar{
  height:44px;
  display:flex;align-items:center;gap:8px;
  background:rgba(17,24,39,0.95);
  border-bottom:1px solid var(--c-border);
  padding:0 16px;
}
.browser-bar .dot{width:10px;height:10px;border-radius:50%}
.browser-bar .dot-r{background:#F87171}
.browser-bar .dot-y{background:#FBBF24}
.browser-bar .dot-g{background:#34D399}
.browser-bar .url-bar{
  flex:1;margin-left:12px;
  background:var(--c-bg);
  border-radius:8px;
  padding:4px 12px;
  font-size:12px;color:var(--c-text-dim);
  text-align:center;
  border:1px solid transparent;
}
.browser-content{position:relative;padding:0}
.browser-content img{
  width:100%;height:280px;object-fit:cover;
  opacity:0.5;
}
.browser-content-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,25,0.3),rgba(11,15,25,0.92));
  display:flex;flex-direction:column;justify-content:center;
  padding:36px;
}
.browser-content-overlay .demo-form{max-width:320px}
.browser-content-overlay .demo-field{margin-bottom:12px}
.browser-content-overlay .demo-field label{
  font-size:12px;color:var(--c-text-dim);margin-bottom:4px;
}
.browser-content-overlay .demo-field input{
  background:rgba(11,15,25,0.8);
  border-color:rgba(31,41,55,0.8);
  padding:9px 12px;font-size:13px;
}

/* 资讯 */
.news-section{
  padding:96px 0;
  background:var(--c-bg);
}
.news-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:32px;
  align-items:start;
}
.news-left-col{display:flex;flex-direction:column;gap:24px}
.news-card{
  display:flex;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .35s,border-color .35s,box-shadow .35s;
}
.news-card:hover{
  transform:translateY(-4px);
  border-color:var(--c-primary);
  box-shadow:var(--shadow-glow),var(--shadow-card);
}
.news-card-large .news-card-cover{
  width:240px;height:100%;object-fit:cover;
  flex-shrink:0;
}
.news-card-body{padding:24px;display:flex;flex-direction:column;gap:10px}
.news-card-body h3{
  font-size:16px;font-weight:700;color:#fff;
  line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card-body p{
  font-size:14px;color:var(--c-text-dim);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card-meta{
  display:flex;align-items:center;gap:12px;
  font-size:12px;color:var(--c-text-dim);
  margin-top:auto;
}
.news-right-col{display:flex;flex-direction:column;gap:16px}
.news-row{
  display:flex;align-items:center;gap:12px;
  padding:16px;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:16px;
  transition:all .35s;
}
.news-row:hover{
  border-color:var(--c-primary);
  box-shadow:var(--shadow-glow);
  transform:translateX(4px);
}
.news-row time{
  font-size:12px;color:var(--c-text-dim);
  flex-shrink:0;
  font-family:"SF Mono",Menlo,Consolas,monospace;
}
.news-row h4{
  font-size:14px;font-weight:600;color:var(--c-text);
  line-height:1.5;
  flex:1;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.news-row .tag{flex-shrink:0;font-size:11px;padding:2px 10px}
.empty-state{
  grid-column:1/-1;
  min-height:200px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;
  background:var(--c-card);
  border:1px dashed var(--c-border);
  border-radius:var(--radius-card);
  color:var(--c-text-dim);
}
.empty-state svg{width:40px;height:40px;color:var(--c-text-dim);opacity:0.5}
.empty-state p{font-size:15px}
.empty-state small{font-size:13px;color:var(--c-text-dim)}

/* 社会认同 */
.social-proof{
  padding:96px 0;
  background:var(--c-bg-soft);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
  position:relative;
  overflow:hidden;
}
.social-proof::before{
  content:"";
  position:absolute;inset:0;
  background:
    repeating-linear-gradient(0deg,transparent 0,transparent 39px,rgba(124,58,237,0.05) 39px,rgba(124,58,237,0.05) 40px),
    repeating-linear-gradient(90deg,transparent 0,transparent 39px,rgba(124,58,237,0.05) 39px,rgba(124,58,237,0.05) 40px);
  pointer-events:none;
}
.stats-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:32px;margin-bottom:56px;text-align:center;
  position:relative;
}
.stat-number{
  font-size:36px;font-weight:800;color:#fff;
  letter-spacing:-0.02em;line-height:1.1;
}
.stat-number .num{color:var(--c-gold)}
.stat-label{
  font-size:14px;color:var(--c-text-dim);
  margin-top:6px;
}
.reviews-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  position:relative;
}
.review-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-card);
  transition:all .35s;
  display:flex;flex-direction:column;gap:12px;
}
.review-card:hover{
  transform:translateY(-4px);
  border-color:var(--c-primary);
  box-shadow:var(--shadow-glow),var(--shadow-card);
}
.stars{
  display:flex;gap:2px;
  color:var(--c-gold);
}
.stars svg{width:14px;height:14px}
.review-text{
  font-size:14px;color:var(--c-text-dim);
  line-height:1.7;
  flex:1;
}
.review-author{
  font-size:14px;font-weight:600;color:#fff;
  display:flex;align-items:center;gap:8px;
}
.review-author::before{
  content:"";
  width:28px;height:28px;border-radius:50%;
  background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
  opacity:0.7;
}

/* FAQ */
.faq-section{
  padding:96px 0;
  background:var(--c-bg);
}
.faq-list{
  max-width:720px;margin:0 auto;
  display:flex;flex-direction:column;gap:12px;
}
.faq-item{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:16px;
  overflow:hidden;
  transition:border-color .3s;
}
.faq-item.open{border-color:var(--c-primary)}
.faq-question{
  width:100%;
  display:flex;align-items:center;gap:12px;
  padding:18px 24px;
  text-align:left;
  cursor:pointer;
  transition:background .3s;
}
.faq-question:hover{background:rgba(124,58,237,0.04)}
.faq-q-mark{
  width:28px;height:28px;border-radius:8px;
  background:rgba(6,182,212,0.1);
  color:var(--c-accent);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;
  flex-shrink:0;
}
.faq-question span{
  flex:1;
  font-size:15px;font-weight:600;color:var(--c-text);
}
.faq-icon{
  width:16px;height:16px;
  color:var(--c-text-dim);
  transition:transform .3s;
  flex-shrink:0;
}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--c-primary-strong)}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .4s ease;
}
.faq-answer-inner{
  padding:0 24px 20px 64px;
  font-size:14px;color:var(--c-text-dim);
  line-height:1.8;
}

/* CTA */
.cta-section{
  padding:80px 0;
  background:var(--c-bg-soft);
  border-top:1px solid var(--c-border);
}
.cta-inner{
  text-align:center;
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,rgba(124,58,237,0.12),rgba(6,182,212,0.08));
  border:1px solid rgba(124,58,237,0.2);
  border-radius:32px;
  padding:64px 32px;
}
.cta-inner h2{
  font-size:32px;font-weight:800;color:#fff;
  margin-bottom:12px;
  letter-spacing:-0.02em;
}
.cta-inner p{
  font-size:16px;color:var(--c-text-dim);
  max-width:440px;margin:0 auto 28px;
  line-height:1.7;
}
.cta-buttons{
  display:flex;justify-content:center;gap:16px;flex-wrap:wrap;
}

/* Footer */
.site-footer{
  background:var(--c-bg-soft);
  border-top:1px solid var(--c-border);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:4fr 2fr 2fr 3fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{
  font-size:13px;color:var(--c-text-dim);
  line-height:1.7;
  margin-bottom:16px;
  max-width:260px;
}
.social-links{
  display:flex;gap:8px;
}
.social-link{
  width:34px;height:34px;border-radius:10px;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--c-border);
  display:flex;align-items:center;justify-content:center;
  color:var(--c-text-dim);
  transition:all .3s;
}
.social-link:hover{
  color:var(--c-accent);
  border-color:var(--c-accent);
  background:rgba(6,182,212,0.08);
}
.social-link svg{width:16px;height:16px}
.footer-col h4{
  font-size:14px;font-weight:700;color:#fff;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:8px}
.footer-col ul a{
  font-size:13px;color:var(--c-text-dim);
  transition:color .3s;
}
.footer-col ul a:hover{color:var(--c-primary-strong)}
.footer-security{
  font-size:12px;color:var(--c-text-dim);
  line-height:1.8;
  background:rgba(6,182,212,0.04);
  border:1px solid rgba(6,182,212,0.1);
  border-radius:12px;
  padding:16px;
}
.footer-bottom{
  border-top:1px solid var(--c-border);
  padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-text-dim);
}
.footer-bottom a{color:var(--c-text-dim)}
.footer-bottom a:hover{color:var(--c-accent)}

/* 底部固定转化条 */
.sticky-cta{
  position:fixed;bottom:0;left:0;right:0;z-index:900;
  height:72px;
  background:rgba(11,15,25,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid rgba(124,58,237,0.4);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 32px;
  transform:translateY(100%);
  transition:transform .4s cubic-bezier(0.4,0,0.2,1);
}
.sticky-cta.show{transform:translateY(0)}
.sticky-cta-left{
  display:flex;flex-direction:column;
  line-height:1.3;
}
.sticky-cta-left span{
  font-size:16px;font-weight:700;color:#fff;
}
.sticky-cta-left small{
  font-size:12px;color:var(--c-text-dim);
}
.sticky-cta .btn{padding:10px 28px;font-size:14px}

/* 响应式 */
@media (max-width:1024px){
  .nav-links{display:none}
  .header-actions .search-box{display:none}
  .mobile-toggle{display:flex}
  .hero-inner{flex-direction:column;gap:40px;text-align:center}
  .hero-content{flex:0 0 100%;max-width:100%}
  .hero-subtitle{margin-left:auto;margin-right:auto}
  .hero-cta{justify-content:center}
  .hero-meta{justify-content:center}
  .hero-visual{max-width:420px;width:100%}
  .hero{min-height:auto;padding-top:120px}
  .feature-grid{grid-template-columns:1fr}
  .feature-card-large,.feature-card-top,.feature-card-bottom{grid-column:span 1}
  .demo-grid{grid-template-columns:1fr;gap:48px}
  .news-grid{grid-template-columns:1fr}
  .review-card{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr;max-width:480px;margin:0 auto}
  .stats-bar{grid-template-columns:2fr 2fr;gap:24px}
  .footer-grid{grid-template-columns:2fr 2fr;gap:32px}
  .hero-h1{font-size:36px}
}
@media (max-width:768px){
  .features{padding:64px 0}
  .demo-section{padding:64px 0}
  .news-section{padding:64px 0}
  .social-proof{padding:64px 0}
  .faq-section{padding:64px 0}
  .section-title{font-size:26px}
  .hero-h1{font-size:32px}
  .hero-subtitle{font-size:15px}
  .trust-grid{grid-template-columns:2fr 2fr;gap:8px}
  .trust-item{padding:8px 10px}
  .news-card{flex-direction:column}
  .news-card-large .news-card-cover{width:100%;height:160px}
  .browser-content img{height:220px}
  .cta-inner{padding:40px 24px}
  .child-title{font-size:24px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  .sticky-cta{height:56px;padding:0 16px}
  .sticky-cta-left span{font-size:14px}
  .sticky-cta-left small{display:none}
  .sticky-cta .btn{padding:8px 20px;font-size:13px;width:auto}
}
@media (max-width:520px){
  .trust-grid{grid-template-columns:1fr 1fr}
  .stats-bar{grid-template-columns:1fr 1fr}
  .reviews-grid{grid-template-columns:1fr}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
  .cta-buttons{flex-direction:column}
  .cta-buttons .btn{width:100%}
  .sticky-cta .btn{margin-left:12px;white-space:nowrap}
  .sticky-cta-left span{font-size:13px}
}

/* 焦点可见性 */
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--c-accent);
  outline-offset:2px;
}

/* roulang page: article */
:root {
            --c-primary: #7C3AED;
            --c-primary-strong: #8B5CF6;
            --c-accent: #06B6D4;
            --c-accent-soft: #22D3EE;
            --c-gold: #F59E0B;
            --c-bg: #0B0F19;
            --c-bg-soft: #111827;
            --c-card: #151A2A;
            --c-border: #1F2937;
            --c-text: #E5E7EB;
            --c-text-dim: #9CA3AF;
            --radius-card: 24px;
            --radius-btn: 12px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(124, 58, 237, 0.25);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

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

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: rgba(11, 15, 25, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--c-border);
            transition: box-shadow 0.3s ease;
        }

        .site-header:hover,
        .site-header:focus-within {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            display: flex;
            align-items: center;
            height: 64px;
            justify-content: space-between;
            gap: 16px;
        }

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

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            border: 1px solid var(--c-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--c-accent);
            background: rgba(6, 182, 212, 0.08);
            flex-shrink: 0;
        }

        .logo-mark svg {
            width: 20px;
            height: 20px;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--c-primary-strong);
        }

        .logo-badge {
            background: rgba(245, 158, 11, 0.15);
            color: var(--c-gold);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            border: 1px solid rgba(245, 158, 11, 0.3);
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            color: var(--c-text-dim);
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
        }

        .nav-link:hover {
            background: rgba(124, 58, 237, 0.12);
            color: #fff;
        }

        .nav-link.active {
            color: #fff;
            font-weight: 600;
            box-shadow: inset 0 -2px 0 var(--c-primary);
            background: rgba(124, 58, 237, 0.1);
        }

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

        .search-box {
            display: flex;
            align-items: center;
            background: var(--c-bg-soft);
            border: 1px solid var(--c-border);
            border-radius: 12px;
            padding: 8px 14px;
            gap: 8px;
            transition: border-color 0.3s, box-shadow 0.3s;
            width: 180px;
        }

        .search-box:focus-within {
            border-color: var(--c-primary);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.3);
        }

        .search-box svg {
            width: 16px;
            height: 16px;
            color: var(--c-text-dim);
            flex-shrink: 0;
        }

        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--c-text);
            font-size: 13px;
            width: 100%;
        }

        .search-box input::placeholder {
            color: var(--c-text-dim);
        }

        .btn-ghost {
            padding: 8px 14px;
            font-size: 14px;
            color: var(--c-accent);
            font-weight: 500;
            border-radius: 12px;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }

        .btn-ghost:hover {
            background: rgba(6, 182, 212, 0.08);
            color: var(--c-accent-soft);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            transition: all 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, #7C3AED, #C026D3);
            color: #fff;
            box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 24px rgba(124, 58, 237, 0.5);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid var(--c-accent);
            color: var(--c-accent);
        }

        .btn-secondary:hover {
            border-color: var(--c-accent-soft);
            color: var(--c-accent-soft);
            background: rgba(6, 182, 212, 0.08);
            transform: translateY(-1px);
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
        }

        .mobile-toggle span {
            width: 22px;
            height: 2px;
            background: var(--c-text);
            border-radius: 2px;
            transition: all 0.3s;
        }

        .breadcrumb-section {
            padding-top: 64px;
            background: linear-gradient(rgba(11, 15, 25, 0.6), rgba(11, 15, 25, 0.9)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding-bottom: 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--c-text-dim);
            padding: 20px 0;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--c-text-dim);
        }

        .breadcrumb a:hover {
            color: var(--c-primary-strong);
        }

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

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

        .article-wrap {
            padding: 40px 0 80px;
            background: var(--c-bg);
            position: relative;
        }

        .article-head {
            max-width: 860px;
            margin: 0 auto 40px;
            text-align: center;
            padding: 24px 0 0;
        }

        .article-title {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            word-break: break-word;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--c-text-dim);
        }

        .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .meta-item svg {
            width: 15px;
            height: 15px;
            color: var(--c-accent);
        }

        .meta-tag {
            background: rgba(245, 158, 11, 0.15);
            color: var(--c-gold);
            padding: 2px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
        }

        .article-body-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .article-body {
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-text);
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin: 40px 0 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--c-border);
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin: 32px 0 12px;
        }

        .article-body p {
            margin-bottom: 24px;
        }

        .article-body blockquote {
            border-left: 4px solid var(--c-primary);
            background: rgba(124, 58, 237, 0.08);
            padding: 16px 24px;
            border-radius: 0 16px 16px 0;
            margin-bottom: 24px;
            color: var(--c-text);
        }

        .article-body ul,
        .article-body ol {
            padding-left: 24px;
            margin-bottom: 24px;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body ul li::marker {
            color: var(--c-accent);
        }

        .article-body ol li::marker {
            color: var(--c-primary-strong);
        }

        .article-body pre {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: 16px;
            padding: 20px;
            overflow-x: auto;
            margin-bottom: 24px;
            font-family: "SF Mono", "Consolas", monospace;
            font-size: 14px;
        }

        .article-body code {
            background: rgba(124, 58, 237, 0.12);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
        }

        .article-body pre code {
            background: transparent;
            padding: 0;
        }

        .article-body img {
            border-radius: 16px;
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }

        .article-body a {
            color: var(--c-accent);
            border-bottom: 1px solid rgba(6, 182, 212, 0.3);
            transition: border-color 0.25s, color 0.25s;
        }

        .article-body a:hover {
            color: var(--c-accent-soft);
            border-color: var(--c-accent-soft);
        }

        .not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-card);
            max-width: 560px;
            margin: 0 auto;
        }

        .not-found h2 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--c-text-dim);
            margin-bottom: 24px;
        }

        .article-nav-wrap {
            max-width: 760px;
            margin: 48px auto 0;
            padding-top: 32px;
            border-top: 1px solid var(--c-border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .related-section {
            padding: 80px 0;
            background: var(--c-bg-soft);
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            text-align: center;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            text-align: center;
            color: var(--c-text-dim);
            font-size: 15px;
            margin-bottom: 48px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
            box-shadow: var(--shadow-card);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--c-primary);
            box-shadow: var(--shadow-glow);
        }

        .related-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

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

        .related-card:hover .related-cover img {
            transform: scale(1.04);
        }

        .related-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(245, 158, 11, 0.9);
            color: #111;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }

        .related-body {
            padding: 20px 24px 24px;
        }

        .related-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }

        .related-body p {
            font-size: 14px;
            color: var(--c-text-dim);
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--c-accent);
            font-weight: 500;
        }

        .related-link svg {
            width: 14px;
            height: 14px;
            transition: transform 0.3s;
        }

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

        .site-footer {
            background: var(--c-bg-soft);
            border-top: 1px solid var(--c-border);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand p {
            margin-top: 16px;
            font-size: 14px;
            color: var(--c-text-dim);
            line-height: 1.7;
        }

        .footer-brand .logo {
            margin-bottom: 8px;
        }

        .social-links {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }

        .social-link {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            border: 1px solid var(--c-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--c-text-dim);
            transition: all 0.3s;
        }

        .social-link:hover {
            color: var(--c-accent);
            border-color: var(--c-accent);
            background: rgba(6, 182, 212, 0.08);
        }

        .social-link svg {
            width: 18px;
            height: 18px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col a {
            font-size: 14px;
            color: var(--c-text-dim);
        }

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

        .footer-security {
            font-size: 12px;
            color: var(--c-text-dim);
            line-height: 1.7;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            padding: 16px;
            border-radius: 12px;
        }

        .footer-bottom {
            border-top: 1px solid var(--c-border);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--c-text-dim);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: var(--c-text-dim);
        }

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

        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            height: 72px;
            background: rgba(11, 15, 25, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--c-primary);
            transform: translateY(100%);
            transition: transform 0.4s ease;
            box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.3);
        }

        .bottom-bar.visible {
            transform: translateY(0);
        }

        .bottom-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .bottom-bar-text {
            display: flex;
            flex-direction: column;
        }

        .bottom-bar-text .title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
        }

        .bottom-bar-text .sub {
            font-size: 12px;
            color: var(--c-text-dim);
        }

        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .search-box {
                width: 140px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 25, 0.98);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--c-border);
                gap: 8px;
            }

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

            .search-box {
                display: none;
            }

            .btn-ghost {
                display: none;
            }

            .header-actions .btn-primary {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .article-title {
                font-size: 28px;
            }

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

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

            .bottom-bar {
                height: 56px;
            }

            .bottom-bar-text .sub {
                display: none;
            }

            .bottom-bar-inner .btn {
                padding: 8px 20px;
                font-size: 13px;
                width: auto;
                flex: 1;
                margin-left: 16px;
            }
        }

        @media (max-width: 520px) {
            .logo-badge {
                display: none;
            }

            .breadcrumb {
                font-size: 12px;
            }

            .article-meta {
                gap: 12px;
            }
        }

        @media (min-width: 768px) and (max-width: 1024px) {
            .related-grid {
                gap: 16px;
            }
        }

        .back-to-top {
            position: fixed;
            right: 20px;
            bottom: 90px;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--c-text-dim);
            cursor: pointer;
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s;
            z-index: 998;
        }

        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
        }

        .back-to-top:hover {
            color: var(--c-accent);
            border-color: var(--c-accent);
            transform: translateY(-3px);
        }

        .back-to-top svg {
            width: 20px;
            height: 20px;
        }

/* roulang page: category1 */
:root {
    --c-primary: #7C3AED;
    --c-primary-strong: #8B5CF6;
    --c-accent: #06B6D4;
    --c-accent-soft: #22D3EE;
    --c-gold: #F59E0B;
    --c-bg: #0B0F19;
    --c-bg-soft: #111827;
    --c-card: #151A2A;
    --c-border: #1F2937;
    --c-text: #E5E7EB;
    --c-text-dim: #9CA3AF;
    --radius-card: 24px;
    --radius-btn: 12px;
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 24px rgba(124, 58, 237, 0.25);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.75;
    font-size: 16px;
    overflow-x: hidden;
  }

  a {
    color: var(--c-accent-soft);
    text-decoration: none;
    transition: color .2s ease;
  }

  a:hover {
    color: var(--c-primary-strong);
  }

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

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

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

  /* ===== Header ===== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 64px;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-border);
  }

  .header-inner {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

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

  .logo-mark {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-accent);
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.4);
    border-radius: 12px;
  }

  .logo-mark svg {
    width: 22px;
    height: 22px;
  }

  .logo-text {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.01em;
  }

  .logo-text span {
    background: linear-gradient(135deg, var(--c-primary), #C026D3);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .logo-badge {
    font-size: 12px;
    font-weight: 600;
    background: rgba(245, 158, 11, 0.12);
    color: var(--c-gold);
    padding: 2px 8px;
    border-radius: 999px;
    letter-spacing: 0.04em;
    white-space: nowrap;
  }

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

  .nav-link {
    font-size: 14px;
    color: var(--c-text-dim);
    padding: 8px 14px;
    border-radius: 999px;
    transition: all .2s ease;
    white-space: nowrap;
  }

  .nav-link:hover {
    background: rgba(124, 58, 237, 0.12);
    color: #fff;
  }

  .nav-link.active {
    color: #fff;
    font-weight: 600;
    background: rgba(124, 58, 237, 0.15);
    box-shadow: inset 0 -2px 0 var(--c-primary);
  }

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

  .search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 8px 14px;
    width: 180px;
    transition: border-color .2s, box-shadow .2s;
  }

  .search-box:focus-within {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.3);
  }

  .search-box svg {
    width: 16px;
    height: 16px;
    color: var(--c-text-dim);
    flex-shrink: 0;
  }

  .search-box input {
    background: transparent;
    border: none;
    color: var(--c-text);
    width: 100%;
    font-size: 14px;
  }

  .search-box input::placeholder {
    color: var(--c-text-dim);
  }

  .login-link {
    font-size: 14px;
    color: var(--c-text);
    white-space: nowrap;
    transition: color .2s;
  }

  .login-link:hover {
    color: var(--c-accent);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-weight: 600;
    font-size: 14px;
    border-radius: var(--radius-btn);
    padding: 14px 28px;
    transition: all .25s ease;
    cursor: pointer;
    white-space: nowrap;
    border: none;
    line-height: 1;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--c-primary), #C026D3);
    color: #fff;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
  }

  .btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
    color: #fff;
  }

  .btn-primary:active {
    transform: translateY(0);
  }

  .btn-outline {
    background: transparent;
    border: 1px solid var(--c-accent);
    color: var(--c-accent);
  }

  .btn-outline:hover {
    border-color: var(--c-accent-soft);
    color: var(--c-accent-soft);
    background: rgba(6, 182, 212, 0.08);
  }

  .btn-ghost {
    background: transparent;
    color: var(--c-text-dim);
    padding: 14px 12px;
  }

  .btn-ghost:hover {
    color: var(--c-primary);
  }

  .btn-ghost .arrow {
    transition: transform .2s;
  }

  .btn-ghost:hover .arrow {
    transform: translateX(4px);
  }

  .header-actions .btn-primary {
    padding: 10px 20px;
    font-size: 14px;
  }

  .hamburger {
    display: none;
    background: transparent;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: var(--c-text);
  }

  .hamburger svg {
    width: 22px;
    height: 22px;
  }

  .mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(11, 15, 25, 0.97);
    backdrop-filter: blur(16px);
    padding: 20px 24px 28px;
    border-bottom: 1px solid var(--c-border);
    z-index: 99;
  }

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

  .mobile-menu .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .mobile-menu .nav-link {
    padding: 12px 16px;
    border-radius: 12px;
  }

  .mobile-menu .search-box {
    width: 100%;
    margin-top: 16px;
  }

  .mobile-menu .btn-primary {
    width: 100%;
    margin-top: 12px;
  }

  /* ===== Hero ===== */
  .page-hero {
    position: relative;
    padding: 140px 0 80px;
    background: var(--c-bg);
    overflow: hidden;
  }

  .page-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('/assets/images/backpic/back-2.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    z-index: 0;
  }

  .page-hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 30%, rgba(124, 58, 237, 0.28), transparent 60%);
  }

  .page-hero .container {
    position: relative;
    z-index: 2;
  }

  .breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--c-text-dim);
    margin-bottom: 20px;
  }

  .breadcrumbs a {
    color: var(--c-text-dim);
  }

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

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

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

  .page-hero h1 {
    font-size: 48px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.01em;
    line-height: 1.2;
    margin: 0 0 12px;
  }

  .hero-sub {
    font-size: 17px;
    color: var(--c-text-dim);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 32px;
  }

  .hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
  }

  .scroll-hint {
    display: flex;
    justify-content: center;
    margin-top: 48px;
    color: var(--c-text-dim);
  }

  .scroll-hint svg {
    width: 24px;
    height: 24px;
    animation: bounce-down 2s infinite;
  }

  @keyframes bounce-down {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(10px);
    }
  }

  /* ===== Section ===== */
  .section {
    padding: 96px 0;
  }

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

  .section-head h2 {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.01em;
    margin: 0 0 8px;
  }

  .section-head p {
    font-size: 15px;
    color: var(--c-text-dim);
    margin: 0;
  }

  /* ===== Features ===== */
  .features-section {
    background: var(--c-bg);
  }

  .features-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: auto auto;
    gap: 24px;
  }

  .feature-card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 28px;
    transition: all .3s ease;
    position: relative;
    overflow: hidden;
  }

  .feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-card), var(--shadow-glow);
  }

  .feature-main {
    grid-column: span 7;
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 320px;
  }

  .feature-main .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-accent);
    margin-bottom: 20px;
  }

  .feature-main .feature-icon svg {
    width: 26px;
    height: 26px;
  }

  .feature-main h3 {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 14px;
  }

  .feature-main ul {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
    display: grid;
    gap: 10px;
  }

  .feature-main ul li {
    position: relative;
    padding-left: 24px;
    font-size: 15px;
    color: var(--c-text-dim);
  }

  .feature-main ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--c-accent);
  }

  .feature-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 12px;
    font-weight: 600;
    background: rgba(245, 158, 11, 0.12);
    color: var(--c-gold);
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid rgba(245, 158, 11, 0.3);
  }

  .feature-card:not(.feature-main) {
    grid-column: span 5;
    min-height: 180px;
  }

  .feature-card:not(.feature-main) .feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid rgba(124, 58, 237, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-primary-strong);
    margin-bottom: 16px;
  }

  .feature-card:not(.feature-main) .feature-icon svg {
    width: 22px;
    height: 22px;
  }

  .feature-card:not(.feature-main) h3 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 8px;
  }

  .feature-card:not(.feature-main) p {
    font-size: 14px;
    color: var(--c-text-dim);
    margin: 0;
    line-height: 1.7;
  }

  /* ===== Flow ===== */
  .flow-section {
    background: var(--c-bg-soft);
  }

  .flow-layout {
    display: grid;
    grid-template-columns: 40% 60%;
    gap: 48px;
    align-items: center;
  }

  .flow-steps h2 {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 32px;
    letter-spacing: -0.01em;
  }

  .steps-list {
    position: relative;
    display: grid;
    gap: 32px;
  }

  .steps-list::before {
    content: '';
    position: absolute;
    left: 22px;
    top: 30px;
    bottom: 30px;
    width: 1px;
    background: linear-gradient(to bottom, var(--c-primary), var(--c-accent));
  }

  .step-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    position: relative;
  }

  .step-num {
    font-size: 14px;
    font-weight: 700;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--c-card);
    border: 1px solid var(--c-primary);
    color: var(--c-primary-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    z-index: 1;
  }

  .step-info h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 6px;
  }

  .step-info p {
    font-size: 14px;
    color: var(--c-text-dim);
    margin: 0;
    line-height: 1.7;
  }

  .browser-window {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: 16px;
    box-shadow: var(--shadow-card);
    overflow: hidden;
  }

  .browser-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    background: var(--c-bg-soft);
    border-bottom: 1px solid var(--c-border);
  }

  .browser-bar .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
  }

  .browser-bar .red {
    background: #F87171;
  }

  .browser-bar .yellow {
    background: #FBBF24;
  }

  .browser-bar .green {
    background: #34D399;
  }

  .browser-url {
    flex: 1;
    margin-left: 8px;
    font-size: 13px;
    color: var(--c-text-dim);
    background: rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    padding: 6px 14px;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .browser-content {
    padding: 32px;
    background-image: url('/assets/images/coverpic/cover-5.webp');
    background-size: cover;
    background-position: center;
    position: relative;
  }

  .browser-content::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(11, 15, 25, 0.7);
    backdrop-filter: blur(2px);
  }

  .login-form {
    position: relative;
    z-index: 2;
    background: rgba(21, 26, 42, 0.92);
    border: 1px solid var(--c-border);
    border-radius: 16px;
    padding: 28px;
    max-width: 360px;
    margin: 0 auto;
  }

  .form-field {
    margin-bottom: 16px;
  }

  .form-field label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--c-text-dim);
    margin-bottom: 6px;
  }

  .form-field input {
    width: 100%;
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 10px 14px;
    color: var(--c-text);
    font-size: 14px;
    transition: border-color .2s, box-shadow .2s;
  }

  .form-field input:focus {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.3);
  }

  .login-form .btn-block {
    width: 100%;
    margin-top: 8px;
  }

  /* ===== Cards ===== */
  .cards-section {
    background: var(--c-bg);
  }

  .cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .guide-card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all .3s ease;
  }

  .guide-card:hover {
    transform: translateY(-4px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-card), var(--shadow-glow);
  }

  .guide-card-img {
    width: 100%;
    height: 170px;
    object-fit: cover;
  }

  .guide-card-body {
    padding: 24px;
  }

  .guide-card-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--c-gold);
    background: rgba(245, 158, 11, 0.1);
    padding: 2px 10px;
    border-radius: 999px;
    margin-bottom: 10px;
  }

  .guide-card-body h3 {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 8px;
    line-height: 1.5;
  }

  .guide-card-body p {
    font-size: 14px;
    color: var(--c-text-dim);
    margin: 0 0 16px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .guide-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--c-text-dim);
  }

  .guide-card-link {
    font-size: 13px;
    color: var(--c-accent);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap .2s;
  }

  .guide-card-link:hover {
    gap: 8px;
  }

  /* ===== FAQ ===== */
  .faq-section {
    background: var(--c-bg-soft);
  }

  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: grid;
    gap: 12px;
  }

  .faq-item {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color .3s;
  }

  .faq-item.active {
    border-color: var(--c-primary);
  }

  .faq-head {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 24px;
    min-height: 64px;
    cursor: pointer;
    user-select: none;
  }

  .faq-q {
    font-size: 16px;
    font-weight: 800;
    color: var(--c-accent);
    background: rgba(6, 182, 212, 0.1);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-style: italic;
  }

  .faq-question {
    flex: 1;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
  }

  .faq-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-dim);
    transition: transform .3s;
    font-size: 18px;
    flex-shrink: 0;
  }

  .faq-item.active .faq-toggle {
    transform: rotate(45deg);
    color: var(--c-primary);
  }

  .faq-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }

  .faq-body-inner {
    padding: 0 24px 20px 72px;
    font-size: 14px;
    color: var(--c-text-dim);
    line-height: 1.75;
  }

  /* ===== CTA ===== */
  .cta-section {
    background: var(--c-bg);
  }

  .cta-card {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(6, 182, 212, 0.08)), var(--c-card);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    text-align: center;
    padding: 64px 40px;
    position: relative;
    overflow: hidden;
  }

  .cta-card::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.15), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
  }

  .cta-card h2 {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 12px;
    letter-spacing: -0.01em;
  }

  .cta-card p {
    font-size: 15px;
    color: var(--c-text-dim);
    margin: 0 auto 28px;
    max-width: 520px;
  }

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

  /* ===== Footer ===== */
  .site-footer {
    background: var(--c-bg-soft);
    border-top: 1px solid var(--c-border);
    padding: 64px 0 32px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
  }

  .footer-brand .logo {
    margin-bottom: 16px;
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--c-text-dim);
    line-height: 1.7;
    margin: 0 0 20px;
  }

  .social-links {
    display: flex;
    gap: 10px;
  }

  .social-link {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-dim);
    transition: all .25s;
  }

  .social-link:hover {
    background: rgba(124, 58, 237, 0.15);
    border-color: var(--c-primary);
    color: #fff;
  }

  .social-link svg {
    width: 18px;
    height: 18px;
  }

  .footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 16px;
  }

  .footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
  }

  .footer-col ul a {
    font-size: 14px;
    color: var(--c-text-dim);
  }

  .footer-col ul a:hover {
    color: var(--c-accent-soft);
  }

  .footer-security {
    font-size: 12px;
    color: var(--c-text-dim);
    line-height: 1.8;
    background: rgba(255, 255, 255, 0.03);
    border-left: 2px solid var(--c-accent);
    padding: 12px 14px;
    border-radius: 0 8px 8px 0;
  }

  .footer-bottom {
    border-top: 1px solid var(--c-border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: var(--c-text-dim);
  }

  .footer-bottom a {
    color: var(--c-text-dim);
  }

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

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .header-actions .search-box {
      display: none;
    }

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

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

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

  @media (max-width: 768px) {
    .nav-links,
    .header-actions .login-link,
    .header-actions .btn-primary {
      display: none;
    }

    .hamburger {
      display: flex;
    }

    .page-hero {
      padding: 110px 0 60px;
    }

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

    .hero-sub {
      font-size: 15px;
    }

    .section {
      padding: 64px 0;
    }

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

    .features-grid {
      display: flex;
      flex-direction: column;
    }

    .feature-card,
    .feature-main,
    .feature-card:not(.feature-main) {
      width: 100%;
      min-height: auto;
    }

    .feature-main {
      min-height: 280px;
    }

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

    .cta-card {
      padding: 40px 24px;
    }

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

    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }

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

    .logo-text {
      font-size: 18px;
    }

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

    .hero-actions {
      flex-direction: column;
    }

    .hero-actions .btn {
      width: 100%;
    }

    .browser-content {
      padding: 20px;
    }

    .login-form {
      padding: 20px;
    }
  }

/* roulang page: category3 */
:root {
            --c-primary: #7C3AED;
            --c-primary-strong: #8B5CF6;
            --c-accent: #06B6D4;
            --c-accent-soft: #22D3EE;
            --c-gold: #F59E0B;
            --c-bg: #0B0F19;
            --c-bg-soft: #111827;
            --c-card: #151A2A;
            --c-border: #1F2937;
            --c-text: #E5E7EB;
            --c-text-dim: #9CA3AF;
            --radius-card: 24px;
            --radius-btn: 12px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(124, 58, 237, 0.25)
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0
        }
        html {
            scroll-behavior: smooth
        }
        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease
        }
        img {
            max-width: 100%;
            display: block
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: rgba(11, 15, 25, .85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--c-border)
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            background: rgba(6, 182, 212, .12);
            border: 1px solid rgba(6, 182, 212, .4);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--c-accent)
        }
        .logo-mark svg {
            width: 20px;
            height: 20px
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap
        }
        .logo-text span {
            color: var(--c-accent-soft)
        }
        .logo-badge {
            font-size: 11px;
            padding: 2px 8px;
            border-radius: 999px;
            background: rgba(245, 158, 11, .15);
            color: var(--c-gold);
            border: 1px solid rgba(245, 158, 11, .3);
            font-weight: 600;
            white-space: nowrap
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px
        }
        .nav-link {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 14px;
            color: var(--c-text-dim);
            transition: all .2s ease;
            white-space: nowrap
        }
        .nav-link:hover {
            background: rgba(124, 58, 237, .12);
            color: var(--c-text)
        }
        .nav-link.active {
            color: #fff;
            font-weight: 600;
            position: relative
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--c-primary);
            border-radius: 2px
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--c-bg-soft);
            border: 1px solid var(--c-border);
            border-radius: 12px;
            padding: 0 12px;
            height: 36px;
            width: 180px;
            transition: border-color .2s, box-shadow .2s
        }
        .header-search:focus-within {
            border-color: var(--c-primary);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, .3)
        }
        .header-search svg {
            width: 14px;
            height: 14px;
            flex-shrink: 0;
            color: var(--c-text-dim)
        }
        .header-search input {
            background: transparent;
            border: none;
            color: var(--c-text);
            font-size: 13px;
            padding: 0 8px;
            width: 100%
        }
        .header-search input::placeholder {
            color: var(--c-text-dim)
        }
        .login-link {
            font-size: 14px;
            color: var(--c-text-dim);
            white-space: nowrap
        }
        .login-link:hover {
            color: var(--c-text)
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 22px;
            cursor: pointer;
            transition: all .25s ease;
            white-space: nowrap;
            border: none
        }
        .btn-primary {
            background: linear-gradient(135deg, #7C3AED, #C026D3);
            color: #fff;
            box-shadow: 0 4px 16px rgba(124, 58, 237, .3)
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(124, 58, 237, .45);
            filter: brightness(1.1)
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(124, 58, 237, .3)
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid var(--c-accent);
            color: var(--c-accent)
        }
        .btn-secondary:hover {
            border-color: var(--c-accent-soft);
            color: var(--c-accent-soft);
            background: rgba(6, 182, 212, .08)
        }
        .btn-ghost {
            background: transparent;
            color: var(--c-text-dim);
            padding: 8px 12px
        }
        .btn-ghost:hover {
            color: var(--c-primary)
        }
        .btn-ghost .arrow {
            transition: transform .2s
        }
        .btn-ghost:hover .arrow {
            transform: translateX(4px)
        }
        .menu-toggle {
            display: none;
            background: transparent;
            color: var(--c-text);
            padding: 8px;
            border-radius: 8px;
            cursor: pointer
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: rgba(11, 15, 25, .98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--c-border);
            padding: 20px 24px;
            z-index: 999
        }
        .mobile-menu.open {
            display: block
        }
        .mobile-menu .nav-links {
            flex-direction: column;
            align-items: stretch;
            gap: 4px
        }
        .mobile-menu .nav-link {
            padding: 12px 16px;
            border-radius: 12px
        }
        .mobile-menu .btn {
            width: 100%;
            margin-top: 12px
        }
        .mobile-menu .header-search {
            width: 100%;
            margin-top: 12px
        }
        .page-hero {
            position: relative;
            padding: 160px 0 80px;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-2.webp') center center/cover no-repeat;
            border-bottom: 1px solid var(--c-border)
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 25, .85) 0%, rgba(11, 15, 25, .92) 60%, var(--c-bg) 100%)
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -20px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(124, 58, 237, .25), transparent 70%);
            pointer-events: none
        }
        .page-hero .container {
            position: relative;
            z-index: 2
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--c-text-dim);
            margin-bottom: 24px
        }
        .breadcrumb a:hover {
            color: var(--c-primary)
        }
        .breadcrumb .sep {
            color: var(--c-border)
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 16px
        }
        .page-hero p {
            font-size: 16px;
            line-height: 1.75;
            color: var(--c-text-dim);
            max-width: 680px
        }
        .section {
            padding: 80px 0
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 48px
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            line-height: 1.2
        }
        .section-head p {
            color: var(--c-text-dim);
            font-size: 14px;
            max-width: 480px;
            text-align: right
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px
        }
        .faq-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all .3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column
        }
        .faq-card:hover {
            transform: translateY(-4px);
            border-color: var(--c-primary);
            box-shadow: var(--shadow-glow)
        }
        .faq-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative
        }
        .faq-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease
        }
        .faq-card:hover .card-img img {
            transform: scale(1.05)
        }
        .faq-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 15, 25, .6))
        }
        .faq-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
            gap: 12px
        }
        .faq-card .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden
        }
        .faq-card .card-body p {
            font-size: 14px;
            color: var(--c-text-dim);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1
        }
        .faq-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid rgba(31, 41, 55, .6)
        }
        .faq-card .card-meta .date {
            font-size: 12px;
            color: var(--c-text-dim);
            font-variant-numeric: tabular-nums
        }
        .faq-tag {
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 999px;
            background: rgba(6, 182, 212, .12);
            border: 1px solid rgba(6, 182, 212, .3);
            color: var(--c-accent-soft);
            font-weight: 500
        }
        .faq-section {
            background: var(--c-bg-soft);
            border-top: 1px solid var(--c-border);
            border-bottom: 1px solid var(--c-border)
        }
        .accordion {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px
        }
        .accordion-item {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color .2s
        }
        .accordion-item.active {
            border-color: var(--c-primary)
        }
        .accordion-header {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            position: relative
        }
        .accordion-header .q-badge {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(6, 182, 212, .15);
            border: 1px solid rgba(6, 182, 212, .3);
            color: var(--c-accent);
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0
        }
        .accordion-header h3 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            flex: 1;
            line-height: 1.5
        }
        .accordion-header .toggle-icon {
            width: 20px;
            height: 20px;
            position: relative;
            flex-shrink: 0;
            transition: transform .3s
        }
        .accordion-header .toggle-icon::before,
        .accordion-header .toggle-icon::after {
            content: '';
            position: absolute;
            background: var(--c-accent);
            border-radius: 2px;
            transition: all .3s
        }
        .accordion-header .toggle-icon::before {
            width: 12px;
            height: 2px;
            top: 9px;
            left: 4px
        }
        .accordion-header .toggle-icon::after {
            width: 2px;
            height: 12px;
            top: 4px;
            left: 9px
        }
        .accordion-item.active .toggle-icon::after {
            transform: scaleY(0)
        }
        .accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
            padding: 0 24px
        }
        .accordion-item.active .accordion-body {
            max-height: 240px;
            padding-bottom: 20px
        }
        .accordion-body p {
            font-size: 14px;
            color: var(--c-text-dim);
            line-height: 1.75;
            border-left: 2px solid rgba(124, 58, 237, .4);
            padding-left: 16px
        }
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(124, 58, 237, .15), transparent 70%)
        }
        .cta-box {
            position: relative;
            z-index: 1;
            background: linear-gradient(135deg, rgba(124, 58, 237, .15), rgba(6, 182, 212, .08));
            border: 1px solid rgba(124, 58, 237, .3);
            border-radius: 32px;
            padding: 64px 48px;
            text-align: center
        }
        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px
        }
        .cta-box p {
            font-size: 15px;
            color: var(--c-text-dim);
            max-width: 560px;
            margin: 0 auto 32px
        }
        .cta-box .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap
        }
        .site-footer {
            background: var(--c-bg-soft);
            border-top: 1px solid var(--c-border);
            padding: 64px 0 0
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px
        }
        .footer-brand .logo {
            margin-bottom: 16px
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--c-text-dim);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 300px
        }
        .social-links {
            display: flex;
            gap: 12px
        }
        .social-link {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--c-text-dim);
            transition: all .2s
        }
        .social-link:hover {
            color: var(--c-accent);
            border-color: var(--c-accent);
            background: rgba(6, 182, 212, .08)
        }
        .social-link svg {
            width: 16px;
            height: 16px
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px
        }
        .footer-col ul a {
            font-size: 14px;
            color: var(--c-text-dim);
            transition: color .2s
        }
        .footer-col ul a:hover {
            color: var(--c-accent)
        }
        .footer-security {
            font-size: 12px;
            color: var(--c-text-dim);
            line-height: 1.75;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: 12px;
            padding: 16px
        }
        .footer-bottom {
            border-top: 1px solid var(--c-border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap
        }
        .footer-bottom span {
            font-size: 13px;
            color: var(--c-text-dim)
        }
        .footer-bottom a {
            color: var(--c-text-dim)
        }
        .footer-bottom a:hover {
            color: var(--c-accent)
        }
        @media(max-width:1024px) {
            .header-search {
                width: 120px
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 13px
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr)
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px
            }
        }
        @media(max-width:768px) {
            .nav-links {
                display: none
            }
            .header-actions .header-search {
                display: none
            }
            .header-actions .login-link {
                display: none
            }
            .header-actions .btn-primary {
                display: none
            }
            .menu-toggle {
                display: block
            }
            .page-hero {
                padding: 120px 0 60px;
                min-height: 360px
            }
            .page-hero h1 {
                font-size: 32px
            }
            .page-hero p {
                font-size: 14px
            }
            .section {
                padding: 56px 0
            }
            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                margin-bottom: 32px
            }
            .section-head p {
                text-align: left
            }
            .card-grid {
                grid-template-columns: 1fr
            }
            .cta-box {
                padding: 40px 24px;
                border-radius: 24px
            }
            .cta-box h2 {
                font-size: 24px
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 40px
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center
            }
        }
        @media(max-width:520px) {
            .header-inner {
                gap: 8px
            }
            .logo-text {
                font-size: 17px
            }
            .logo-badge {
                font-size: 10px;
                padding: 2px 6px
            }
            .container {
                padding: 0 16px
            }
            .page-hero h1 {
                font-size: 28px
            }
            .accordion-header {
                padding: 16px 16px
            }
            .accordion-header h3 {
                font-size: 14px
            }
            .accordion-body {
                padding: 0 16px
            }
            .cta-box .btn-group {
                flex-direction: column
            }
            .cta-box .btn {
                width: 100%
            }
        }

/* roulang page: category2 */
:root {
      --c-primary: #7C3AED;
      --c-primary-strong: #8B5CF6;
      --c-accent: #06B6D4;
      --c-accent-soft: #22D3EE;
      --c-gold: #F59E0B;
      --c-bg: #0B0F19;
      --c-bg-soft: #111827;
      --c-card: #151A2A;
      --c-border: #1F2937;
      --c-text: #E5E7EB;
      --c-text-dim: #9CA3AF;
      --radius-card: 24px;
      --radius-btn: 12px;
      --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
      --shadow-glow: 0 0 24px rgba(124,58,237,0.25);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      background: var(--c-bg);
      color: var(--c-text);
      line-height: 1.75;
      font-size: 16px;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
    }
    a:hover {
      color: inherit;
    }

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

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

    ul,
    ol {
      list-style: none;
    }

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

    /* ========= Header ========= */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      height: 64px;
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
      transition: background 0.3s ease;
    }

    .header-inner {
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

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

    .logo-mark {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: rgba(124, 58, 237, 0.15);
      border: 1px solid rgba(34, 211, 238, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--c-accent-soft);
      flex-shrink: 0;
    }

    .logo-mark svg {
      width: 22px;
      height: 22px;
    }

    .logo-text {
      font-size: 19px;
      font-weight: 800;
      color: #fff;
      letter-spacing: -0.01em;
      white-space: nowrap;
    }

    .logo-text span {
      color: var(--c-primary-strong);
    }

    .logo-badge {
      font-size: 12px;
      font-weight: 700;
      color: #fff;
      background: linear-gradient(135deg, #7C3AED, #C026D3);
      border-radius: 999px;
      padding: 2px 10px;
      white-space: nowrap;
      box-shadow: 0 0 12px rgba(124, 58, 237, 0.35);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0 8px;
    }

    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--c-text-dim);
      padding: 8px 16px;
      border-radius: 999px;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .nav-link:hover {
      color: #fff;
      background: rgba(124, 58, 237, 0.12);
    }

    .nav-link.active {
      color: #fff;
      background: rgba(124, 58, 237, 0.16);
      box-shadow: inset 0 -2px 0 var(--c-primary);
      font-weight: 600;
    }

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

    .search-box {
      position: relative;
    }

    .search-box input {
      width: 160px;
      background: var(--c-bg-soft);
      border: 1px solid var(--c-border);
      border-radius: 12px;
      padding: 9px 14px 9px 36px;
      color: var(--c-text);
      font-size: 13px;
      transition: all 0.25s ease;
    }

    .search-box input::placeholder {
      color: var(--c-text-dim);
    }

    .search-box input:focus {
      border-color: var(--c-primary);
      box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.25);
      outline: none;
    }

    .search-box .search-icon {
      position: absolute;
      left: 12px;
      top: 50%;
      transform: translateY(-50%);
      width: 16px;
      height: 16px;
      color: var(--c-text-dim);
      pointer-events: none;
    }

    .login-link {
      font-size: 14px;
      color: var(--c-text-dim);
      transition: color 0.25s ease;
      white-space: nowrap;
    }

    .login-link:hover {
      color: var(--c-accent-soft);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 10px 20px;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
      border: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, #7C3AED, #C026D3);
      color: #fff;
      box-shadow: 0 4px 16px rgba(124, 58, 237, 0.4);
    }

    .btn-primary:hover {
      filter: brightness(1.15);
      box-shadow: var(--shadow-glow);
      transform: translateY(-2px);
    }

    .btn-primary:active {
      transform: translateY(0);
      filter: brightness(0.95);
    }

    .btn-secondary {
      background: transparent;
      border: 1px solid var(--c-accent);
      color: var(--c-accent);
    }

    .btn-secondary:hover {
      border-color: var(--c-accent-soft);
      color: var(--c-accent-soft);
      background: rgba(6, 182, 212, 0.08);
      transform: translateY(-2px);
    }

    .btn-ghost {
      background: transparent;
      color: var(--c-text-dim);
      border: 1px solid transparent;
    }

    .btn-ghost:hover {
      color: var(--c-primary-strong);
    }

    .btn-ghost:hover .arrow-icon {
      transform: translateX(4px);
    }

    .arrow-icon {
      display: inline-block;
      transition: transform 0.25s ease;
    }

    .menu-toggle {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 10px;
      border: 1px solid var(--c-border);
      color: var(--c-text);
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.25s ease;
      flex-shrink: 0;
    }

    .menu-toggle:hover {
      border-color: var(--c-primary);
      background: rgba(124, 58, 237, 0.1);
    }

    .menu-toggle svg {
      width: 20px;
      height: 20px;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      z-index: 999;
      background: var(--c-bg);
      border-bottom: 1px solid var(--c-border);
      padding: 20px 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
      flex-direction: column;
      gap: 12px;
    }

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

    .mobile-menu .nav-link {
      display: block;
      font-size: 16px;
      padding: 12px 16px;
      border-radius: 12px;
    }

    .mobile-menu .search-box {
      margin: 8px 0;
    }

    .mobile-menu .search-box input {
      width: 100%;
      font-size: 15px;
      padding: 12px 14px 12px 40px;
    }

    .mobile-menu .btn {
      width: 100%;
      padding: 14px;
      font-size: 15px;
    }

    /* ========= Hero ========= */
    .hero {
      position: relative;
      padding: 160px 0 120px;
      overflow: hidden;
      background: var(--c-bg);
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.35;
      z-index: 0;
    }

    .hero-bg::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(124, 58, 237, 0.25), transparent 60%);
    }

    .hero::before {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 120px;
      background: linear-gradient(to bottom, transparent, var(--c-bg));
      z-index: 1;
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 780px;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 14px;
      color: var(--c-text-dim);
      margin-bottom: 24px;
    }

    .breadcrumb a {
      transition: color 0.25s ease;
    }

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

    .breadcrumb .separator {
      color: #4B5563;
    }

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

    .hero h1 {
      font-size: 48px;
      font-weight: 800;
      color: #fff;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }

    .hero h1 .highlight {
      background: linear-gradient(135deg, #7C3AED, #06B6D4);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--c-text-dim);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 640px;
    }

    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--c-accent-soft);
      background: rgba(6, 182, 212, 0.1);
      border: 1px solid rgba(6, 182, 212, 0.3);
      border-radius: 999px;
      padding: 4px 14px;
      margin-bottom: 20px;
    }

    .hero-tag::before {
      content: '';
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--c-accent-soft);
      animation: pulse 1.6s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.7); }
    }

    /* ========= Section 通用 ========= */
    .section {
      padding: 96px 0;
    }

    .section-soft {
      background: var(--c-bg-soft);
    }

    .section-head {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 56px;
    }

    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      letter-spacing: -0.01em;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-head p {
      font-size: 16px;
      color: var(--c-text-dim);
      line-height: 1.75;
    }

    /* ========= 步骤 ========= */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .step-card {
      position: relative;
      background: var(--c-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

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

    .step-number {
      font-size: 40px;
      font-weight: 800;
      color: transparent;
      -webkit-text-stroke: 1px var(--c-accent);
      line-height: 1;
      margin-bottom: 20px;
      font-family: -apple-system, "PingFang SC", sans-serif;
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

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

    .step-card::after {
      content: '→';
      position: absolute;
      top: 50%;
      right: -22px;
      transform: translateY(-50%);
      color: var(--c-accent);
      font-size: 20px;
      z-index: 2;
    }

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

    /* ========= 资源卡片 ========= */
    .resource-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .resource-card {
      background: var(--c-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .resource-card:hover {
      transform: translateY(-4px);
      border-color: var(--c-primary);
      box-shadow: var(--shadow-glow);
    }

    .resource-card .card-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      position: relative;
    }

    .resource-card .card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .resource-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      line-height: 1.4;
    }

    .resource-card p {
      font-size: 14px;
      color: var(--c-text-dim);
      line-height: 1.7;
      flex: 1;
    }

    .resource-card .card-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--c-accent-soft);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: color 0.25s ease;
    }

    .resource-card .card-link:hover {
      color: var(--c-primary-strong);
    }

    .resource-card .card-link .arrow-icon {
      transition: transform 0.25s ease;
    }

    .resource-card .card-link:hover .arrow-icon {
      transform: translateX(4px);
    }

    .card-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(245, 158, 11, 0.92);
      color: #111;
      font-size: 12px;
      font-weight: 700;
      border-radius: 999px;
      padding: 4px 12px;
      z-index: 2;
    }

    .card-img-wrap {
      position: relative;
      display: block;
    }

    .card-img-wrap::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(11, 15, 25, 0.4), transparent 60%);
      pointer-events: none;
    }

    /* ========= 准备清单 ========= */
    .checklist-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .checklist-card {
      background: var(--c-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-card);
      padding: 36px 32px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

    .checklist-card:hover {
      border-color: var(--c-accent);
      box-shadow: 0 8px 30px rgba(6, 182, 212, 0.15);
    }

    .checklist-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .checklist-card h3 .icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: rgba(6, 182, 212, 0.12);
      border: 1px solid rgba(6, 182, 212, 0.3);
      color: var(--c-accent-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }

    .checklist-card h3 .icon.purple {
      background: rgba(124, 58, 237, 0.12);
      border-color: rgba(124, 58, 237, 0.3);
      color: var(--c-primary-strong);
    }

    .checklist-card ul {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .checklist-card ul li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      color: var(--c-text);
      line-height: 1.6;
    }

    .checklist-card ul li::before {
      content: '✓';
      flex-shrink: 0;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: rgba(6, 182, 212, 0.15);
      color: var(--c-accent-soft);
      font-size: 12px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 2px;
    }

    /* ========= FAQ ========= */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--c-card);
      border: 1px solid var(--c-border);
      border-radius: 16px;
      overflow: hidden;
      transition: border-color 0.3s ease;
    }

    .faq-item.active {
      border-color: var(--c-primary);
    }

    .faq-question {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      user-select: none;
    }

    .faq-q-badge {
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: rgba(6, 182, 212, 0.12);
      color: var(--c-accent-soft);
      font-size: 14px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .faq-question span {
      flex: 1;
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      line-height: 1.5;
    }

    .faq-toggle {
      width: 24px;
      height: 24px;
      border-radius: 6px;
      border: 1px solid var(--c-border);
      color: var(--c-text-dim);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      flex-shrink: 0;
    }

    .faq-toggle svg {
      width: 14px;
      height: 14px;
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-toggle {
      border-color: var(--c-primary);
      color: var(--c-primary-strong);
    }

    .faq-item.active .faq-toggle svg {
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      font-size: 14px;
      color: var(--c-text-dim);
      line-height: 1.75;
      transition: max-height 0.35s ease, padding 0.35s ease;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
      padding-left: 68px;
    }

    /* ========= CTA ========= */
    .section-cta {
      position: relative;
      padding: 96px 0;
      background: var(--c-bg);
      overflow: hidden;
    }

    .cta-inner {
      background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(6, 182, 212, 0.08));
      border: 1px solid rgba(124, 58, 237, 0.3);
      border-radius: 32px;
      padding: 64px 48px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-inner::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -100px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(124, 58, 237, 0.3), transparent 70%);
      pointer-events: none;
    }

    .cta-inner h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      letter-spacing: -0.01em;
    }

    .cta-inner p {
      font-size: 16px;
      color: var(--c-text-dim);
      max-width: 500px;
      margin: 0 auto 32px;
    }

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

    /* ========= Footer ========= */
    .site-footer {
      background: var(--c-bg-soft);
      border-top: 1px solid var(--c-border);
      padding: 64px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
    }

    .footer-brand .logo {
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 14px;
      color: var(--c-text-dim);
      line-height: 1.75;
      margin-bottom: 20px;
      max-width: 360px;
    }

    .social-links {
      display: flex;
      gap: 12px;
    }

    .social-link {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      border: 1px solid var(--c-border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--c-text-dim);
      transition: all 0.25s ease;
    }

    .social-link:hover {
      border-color: var(--c-primary);
      color: var(--c-primary-strong);
      background: rgba(124, 58, 237, 0.1);
    }

    .social-link svg {
      width: 18px;
      height: 18px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-col ul a {
      font-size: 14px;
      color: var(--c-text-dim);
      transition: color 0.25s ease;
    }

    .footer-col ul a:hover {
      color: var(--c-accent-soft);
    }

    .footer-security {
      font-size: 12px;
      color: var(--c-text-dim);
      line-height: 1.8;
      background: rgba(11, 15, 25, 0.6);
      border: 1px solid var(--c-border);
      border-radius: 12px;
      padding: 16px;
    }

    .footer-bottom {
      border-top: 1px solid var(--c-border);
      padding: 20px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: #6B7280;
    }

    .footer-bottom a {
      color: #6B7280;
      transition: color 0.25s ease;
    }

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

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

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

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

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

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

      .header-actions .search-box {
        display: none;
      }

      .header-actions .login-link {
        display: none;
      }
    }

    @media (max-width: 768px) {
      .header-actions .btn-primary {
        display: none;
      }

      .nav-links {
        display: none;
      }

      .menu-toggle {
        display: flex;
      }

      .hero {
        padding: 120px 0 80px;
      }

      .hero h1 {
        font-size: 32px;
      }

      .hero-desc {
        font-size: 16px;
      }

      .section {
        padding: 64px 0;
      }

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

      .steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .resource-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .checklist-grid {
        gap: 20px;
      }

      .cta-inner {
        padding: 40px 24px;
      }

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

      .faq-answer.active {
        padding-left: 24px;
      }

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

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }

      .hero-cta {
        flex-direction: column;
        align-items: stretch;
      }

      .hero-cta .btn {
        width: 100%;
      }
    }

    @media (max-width: 520px) {
      .header-actions .search-box {
        display: none;
      }

      .header-actions .login-link {
        display: none;
      }

      .header-actions .btn {
        display: none;
      }

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

      .logo-badge {
        display: none;
      }

      .resource-card .card-img {
        height: 160px;
      }

      .step-card {
        padding: 28px 20px;
      }

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

      .cta-buttons {
        flex-direction: column;
      }

      .cta-buttons .btn {
        width: 100%;
      }
    }