/* roulang page: index */
:root{
  --bg-ink:#060A13;
  --bg-deep:#0B1120;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.09);
  --glass-border:rgba(255,255,255,.12);
  --brand-500:#1E5EFF;
  --brand-300:#4D8DFF;
  --cyan-glow:#00D9C0;
  --warn:#FFB547;
  --danger:#FF5A6A;
  --text-hi:rgba(255,255,255,.92);
  --text-mid:rgba(255,255,255,.66);
  --text-low:rgba(255,255,255,.42);
  --glow-brand:0 0 24px rgba(30,94,255,.45);
  --glow-cyan:0 0 24px rgba(0,217,192,.35);
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-card:0 8px 30px rgba(0,0,0,.35);
  --shadow-hover:0 16px 48px rgba(0,0,0,.5);
  --font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
  --font-mono:"SF Mono","JetBrains Mono","Roboto Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-family);
  background:var(--bg-ink);
  color:var(--text-hi);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 1.25rem;width:100%}
.grid-container{max-width:1200px}
section{position:relative}
.section-pad{padding:clamp(3rem,7vw,6.5rem) 0}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  background:linear-gradient(120deg,var(--brand-300),var(--brand-500));
  color:#fff!important;font-weight:600;font-size:.95rem;
  padding:.85rem 1.75rem;border-radius:var(--radius-md);border:0;cursor:pointer;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.25),var(--glow-brand);
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
  white-space:nowrap;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 0 28px rgba(30,94,255,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  background:var(--glass);color:rgba(255,255,255,.92)!important;
  font-weight:500;font-size:.95rem;
  padding:.85rem 1.75rem;border-radius:var(--radius-md);
  border:1px solid rgba(255,255,255,.12);cursor:pointer;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
  white-space:nowrap;
}
.btn-secondary:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.22);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(1px)}
.btn-primary:focus-visible,.btn-secondary:focus-visible,.text-link:focus-visible,.btn-ghost:focus-visible{
  outline:2px solid var(--cyan-glow);outline-offset:3px;border-radius:var(--radius-sm);
}
.text-link{
  display:inline-flex;align-items:center;gap:.45rem;
  color:var(--brand-300)!important;font-weight:500;font-size:.9rem;
  transition:color .2s ease,gap .2s ease;
}
.text-link i{transition:transform .2s ease}
.text-link:hover{color:var(--cyan-glow)!important}
.text-link:hover i{transform:translateX(3px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:.5rem;
  color:var(--text-mid);font-size:.9rem;font-weight:500;
  padding:.6rem 1rem;border-radius:var(--radius-sm);
  border:1px solid transparent;background:transparent;cursor:pointer;
  transition:all .2s ease;
}
.btn-ghost:hover{color:var(--text-hi);background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.08)}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:68px;
  background:rgba(6,10,19,.78);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:box-shadow .3s ease;
}
.site-header.scrolled{box-shadow:0 4px 30px rgba(0,0,0,.5)}
.header-inner{
  height:68px;display:flex;align-items:center;justify-content:space-between;
  gap:1rem;max-width:1280px;margin:0 auto;padding:0 1.5rem;width:100%;
}
.logo-brand{
  display:inline-flex;align-items:center;gap:.6rem;
  color:var(--text-hi);font-size:1.1rem;font-weight:700;letter-spacing:.02em;
  flex-shrink:0;
}
.logo-brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,rgba(30,94,255,.25),rgba(0,217,192,.15));
  border:1px solid rgba(30,94,255,.4);
  font-family:var(--font-mono);font-weight:700;font-size:.82rem;
  color:var(--cyan-glow);
}
.logo-brand:hover .logo-brand__mark{animation:pulseGlow 1.5s ease infinite alternate}
@keyframes pulseGlow{
  0%{box-shadow:0 0 8px rgba(0,217,192,.2)}
  100%{box-shadow:0 0 20px rgba(0,217,192,.55)}
}
.main-nav{display:flex;align-items:center;gap:2rem;margin-left:1.5rem}
.main-nav a{
  color:var(--text-mid);font-size:.95rem;font-weight:500;
  padding:.4rem 0;position:relative;transition:color .2s ease;
}
.main-nav a::after{
  content:'';position:absolute;left:0;right:100%;bottom:-2px;height:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--cyan-glow));
  transition:right .25s ease;
}
.main-nav a:hover{color:var(--text-hi)}
.main-nav a:hover::after{right:0}
.main-nav a.active{color:var(--text-hi)}
.main-nav a.active::after{right:0}
.header-tools{display:flex;align-items:center;gap:.65rem;margin-left:auto}
.command-search{
  position:relative;width:180px;
}
.command-search input{
  width:100%;height:38px;border-radius:999px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.1);
  color:var(--text-hi);padding:0 2.2rem 0 2.3rem;
  font-size:.85rem;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.command-search input::placeholder{color:var(--text-low)}
.command-search input:hover{border-color:rgba(255,255,255,.18)}
.command-search input:focus{
  border-color:var(--brand-500);background:rgba(255,255,255,.09);
  box-shadow:0 0 0 3px rgba(30,94,255,.15);
}
.command-search .search-icon{
  position:absolute;left:.85rem;top:50%;transform:translateY(-50%);
  color:var(--text-low);font-size:.8rem;pointer-events:none;
}
.command-search .kbd-badge{
  position:absolute;right:.6rem;top:50%;transform:translateY(-50%);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
  border-radius:5px;padding:0 .35rem;
  font-family:var(--font-mono);font-size:.7rem;color:var(--text-low);
  pointer-events:none;
}
.command-panel{
  position:absolute;top:calc(100% + 10px);left:0;right:0;
  background:rgba(11,17,32,.96);backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-md);
  box-shadow:var(--shadow-hover),var(--glow-brand);
  padding:.5rem;display:none;z-index:50;
}
.command-search input:focus + .command-panel,
.command-panel:hover{display:block}
.command-panel__item{
  display:flex;align-items:center;gap:.6rem;
  padding:.6rem .75rem;border-radius:8px;font-size:.88rem;color:var(--text-mid);
  transition:background .15s ease,color .15s ease;
}
.command-panel__item i{width:14px;text-align:center;color:var(--text-low)}
.command-panel__item:hover{background:rgba(30,94,255,.15);color:var(--text-hi)}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  color:var(--text-mid);background:transparent;border:1px solid transparent;
  cursor:pointer;transition:all .2s ease;font-size:.9rem;
}
.icon-btn:hover{color:var(--cyan-glow);background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1)}
.header-cta{
  font-size:.88rem;padding:.6rem 1.25rem;border-radius:10px;
}
.hamburger{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.04);color:var(--text-hi);cursor:pointer;
  align-items:center;justify-content:center;font-size:1.1rem;
  transition:all .2s ease;
}
.hamburger:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2)}
.mobile-menu{
  display:none;position:fixed;top:68px;left:0;right:0;bottom:0;z-index:90;
  background:rgba(6,10,19,.97);backdrop-filter:blur(24px);
  padding:2rem 1.5rem;flex-direction:column;gap:.35rem;
  overflow-y:auto;
}
.mobile-menu.open{display:flex}
.mobile-menu a{
  display:flex;align-items:center;padding:1rem .5rem;
  font-size:1.125rem;font-weight:500;color:var(--text-mid);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:color .2s ease,background .2s ease;
}
.mobile-menu a:hover,.mobile-menu a.active{color:var(--cyan-glow);background:rgba(255,255,255,.03)}
.mobile-menu .mobile-cta{
  margin-top:1.5rem;justify-content:center;
  background:linear-gradient(120deg,var(--brand-300),var(--brand-500));
  color:#fff!important;border:0;border-radius:var(--radius-md);
  padding:1rem;font-weight:600;
}

/* ---------- Hero ---------- */
.hero{
  min-height:80vh;display:flex;align-items:center;position:relative;
  padding:8rem 0 4rem;overflow:hidden;
  background:
    linear-gradient(rgba(6,10,19,.82),rgba(6,10,19,.92)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
}
.hero::after{
  content:'';position:absolute;left:-120px;bottom:-80px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(30,94,255,.35),transparent 65%);
  pointer-events:none;
}
.hero-glow{
  position:absolute;right:-60px;top:-60px;width:380px;height:380px;
  background:radial-gradient(circle,rgba(0,217,192,.22),transparent 65%);
  pointer-events:none;
}
.hero-content{position:relative;z-index:2;max-width:680px}
.hero-badge{
  display:inline-flex;align-items:center;gap:.5rem;
  background:rgba(0,217,192,.1);border:1px solid rgba(0,217,192,.25);
  color:var(--cyan-glow);font-size:.8rem;font-weight:600;
  padding:.4rem 1rem;border-radius:999px;margin-bottom:1.5rem;
  letter-spacing:.02em;
}
.hero-badge::before{
  content:'';width:6px;height:6px;border-radius:50%;
  background:var(--cyan-glow);box-shadow:0 0 8px var(--cyan-glow);
  animation:dotBlink 2s ease infinite;
}
@keyframes dotBlink{
  0%,100%{opacity:1}
  50%{opacity:.4}
}
.hero h1{
  font-size:clamp(2rem,4.5vw,3.4rem);
  font-weight:700;line-height:1.15;letter-spacing:.01em;
  margin-bottom:1.25rem;
  background:linear-gradient(120deg,#fff,rgba(255,255,255,.8));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-sub{
  font-size:1.05rem;color:var(--text-mid);line-height:1.8;
  max-width:560px;margin-bottom:2rem;
}
.hero-actions{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:2.5rem}
.hero-stats{
  display:flex;align-items:center;gap:0;flex-wrap:wrap;
  padding-top:1.75rem;border-top:1px solid rgba(255,255,255,.08);
  max-width:520px;
}
.hero-stat{
  padding-right:1.75rem;margin-right:1.75rem;
  border-right:1px solid rgba(255,255,255,.1);
}
.hero-stat:last-child{border-right:0;margin-right:0;padding-right:0}
.hero-stat__num{
  font-family:var(--font-mono);font-size:1.5rem;font-weight:700;
  color:var(--cyan-glow);display:block;line-height:1.2;
}
.hero-stat__label{font-size:.8rem;color:var(--text-low);margin-top:.15rem}

/* ---------- Stats Bar ---------- */
.stats-bar{
  background:var(--bg-deep);
  border-top:1px solid rgba(255,255,255,.06);
  border-bottom:1px solid rgba(255,255,255,.06);
  padding:2.75rem 0;
}
.stats-bar .grid-x{align-items:center}
.stat-item{
  text-align:center;padding:1rem;
}
.stat-item__num{
  font-family:var(--font-mono);font-size:2rem;font-weight:700;
  color:var(--text-hi);display:block;line-height:1.2;
  background:linear-gradient(120deg,var(--brand-300),var(--cyan-glow));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-item__label{font-size:.85rem;color:var(--text-mid);margin-top:.35rem}

/* ---------- Section Head ---------- */
.section-head{text-align:center;max-width:680px;margin:0 auto 3rem}
.section-head h2{
  font-size:clamp(1.5rem,3vw,2.25rem);font-weight:600;line-height:1.25;
  margin-bottom:.75rem;
}
.section-head p{color:var(--text-mid);font-size:.98rem}
.section-head--left{text-align:left;margin:0 0 2.5rem}

/* ---------- Features ---------- */
.features-section{
  background:var(--bg-ink);
}
.feature-grid{
  display:grid;grid-template-columns:1fr 1fr 1fr 1fr;
  gap:1.25rem;margin-bottom:1.25rem;
}
.feature-card{
  background:var(--glass);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:2rem;
  position:relative;
  overflow:hidden;
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;width:40px;height:2px;
  background:linear-gradient(90deg,var(--brand-500),transparent);
  transition:width .3s ease;
}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.2);box-shadow:var(--shadow-hover)}
.feature-card:hover::before{width:100%}
.feature-card.wide{grid-column:span 2}
.feature-card__icon{
  width:48px;height:48px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(30,94,255,.12);color:var(--brand-300);
  font-size:1.2rem;margin-bottom:1.25rem;
  border:1px solid rgba(30,94,255,.2);
  transition:color .25s ease,background .25s ease,box-shadow .25s ease;
}
.feature-card:hover .feature-card__icon{
  color:var(--cyan-glow);background:rgba(0,217,192,.1);
  box-shadow:0 0 18px rgba(0,217,192,.2);
}
.feature-card h3{font-size:1.25rem;font-weight:600;margin-bottom:.6rem}
.feature-card p{color:var(--text-mid);font-size:.92rem;line-height:1.7;margin-bottom:1rem}
.feature-strip{
  display:grid;grid-template-columns:1fr 1fr 1fr;
  gap:1.25rem;
}
.feature-strip__item{
  display:flex;align-items:flex-start;gap:1rem;
  background:var(--glass);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:1.5rem;
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.feature-strip__item:hover{border-color:rgba(0,217,192,.3);box-shadow:var(--glow-cyan);transform:translateY(-3px)}
.feature-strip__icon{
  flex-shrink:0;width:42px;height:42px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.06);color:var(--brand-300);
  font-size:1rem;border:1px solid rgba(255,255,255,.08);
  transition:color .2s ease;
}
.feature-strip__item:hover .feature-strip__icon{color:var(--cyan-glow)}
.feature-strip__body h4{font-size:1.02rem;font-weight:600;margin-bottom:.3rem}
.feature-strip__body p{font-size:.88rem;color:var(--text-mid);line-height:1.65}

/* ---------- Scenarios ---------- */
.scenarios-section{background:var(--bg-deep);border-top:1px solid rgba(255,255,255,.05)}
.scenario-block{
  display:grid;grid-template-columns:3fr 2fr;gap:3rem;align-items:center;
  margin-bottom:4rem;
}
.scenario-block:nth-child(even){grid-template-columns:2fr 3fr}
.scenario-block:nth-child(even) .scenario-media{order:2}
.scenario-block:last-child{margin-bottom:0}
.scenario-media{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-card);
}
.scenario-media img{
  width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;
  border-radius:var(--radius-lg);
}
.scenario-media::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(6,10,19,.6));
  border-radius:var(--radius-lg);
}
.scenario-tag{
  position:absolute;top:1.25rem;left:1.25rem;z-index:2;
  background:rgba(6,10,19,.7);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.15);
  color:var(--text-hi);font-family:var(--font-mono);font-size:.85rem;
  padding:.35rem .85rem;border-radius:999px;
}
.scenario-body h3{font-size:1.5rem;font-weight:600;margin-bottom:.75rem}
.scenario-body>p{color:var(--text-mid);font-size:.95rem;margin-bottom:1.25rem}
.scenario-list{margin-bottom:1.5rem}
.scenario-list li{
  display:flex;align-items:flex-start;gap:.6rem;
  padding:.4rem 0;color:var(--text-mid);font-size:.92rem;
}
.scenario-list li i{
  color:var(--cyan-glow);font-size:.75rem;margin-top:.4rem;
  flex-shrink:0;
}

/* ---------- Cases ---------- */
.cases-section{background:var(--bg-ink)}
.cases-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem}
.case-card{
  background:var(--glass);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);padding:1.75rem 1.75rem 0;
  position:relative;overflow:hidden;
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.case-card::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--cyan-glow));
  opacity:.5;transition:opacity .25s ease;
}
.case-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.2);box-shadow:var(--shadow-hover)}
.case-card:hover::after{opacity:1}
.case-card__top{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:.75rem;
}
.case-card__name{font-weight:600;font-size:1.05rem}
.case-card__tag{
  font-size:.75rem;color:var(--cyan-glow);
  background:rgba(0,217,192,.08);border:1px solid rgba(0,217,192,.2);
  padding:.2rem .65rem;border-radius:999px;
}
.case-card__desc{color:var(--text-mid);font-size:.9rem;line-height:1.65;margin-bottom:1.25rem}
.case-card__metric{
  font-family:var(--font-mono);font-size:1.4rem;font-weight:700;
  color:var(--text-hi);padding:1rem 0 1.5rem;
  transition:color .25s ease,text-shadow .25s ease;
}
.case-card:hover .case-card__metric{
  color:var(--cyan-glow);text-shadow:0 0 20px rgba(0,217,192,.3);
}
.case-card__metric small{
  font-size:.8rem;color:var(--text-low);font-weight:400;
  margin-left:.5rem;font-family:var(--font-family);
}

/* ---------- News / CMS ---------- */
.news-section{background:var(--bg-deep);border-top:1px solid rgba(255,255,255,.05)}
.news-top{display:grid;grid-template-columns:7fr 5fr;gap:1.5rem;margin-bottom:1.5rem}
.news-featured{
  background:var(--glass);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);overflow:hidden;
  position:relative;backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:border-color .25s ease,box-shadow .25s ease;
}
.news-featured:hover{border-color:rgba(255,255,255,.22);box-shadow:var(--shadow-hover)}
.news-featured__media{position:relative;display:block;overflow:hidden}
.news-featured__media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  transition:transform .4s ease;
}
.news-featured:hover .news-featured__media img{transform:scale(1.03)}
.news-featured__cat{
  position:absolute;top:1rem;left:1rem;
  background:rgba(6,10,19,.75);backdrop-filter:blur(6px);
  border:1px solid rgba(0,217,192,.35);
  color:var(--cyan-glow);font-size:.75rem;font-weight:600;
  padding:.28rem .8rem;border-radius:999px;z-index:2;
}
.news-featured__body{padding:1.5rem 1.75rem 1.75rem}
.news-featured__body h3{font-size:1.3rem;font-weight:600;line-height:1.4;margin-bottom:.75rem}
.news-featured__body h3 a{transition:color .2s ease}
.news-featured__body h3 a:hover{color:var(--brand-300)}
.news-featured__excerpt{
  color:var(--text-mid);font-size:.9rem;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:1.1rem;
}
.news-meta{
  display:flex;align-items:center;gap:1rem;flex-wrap:wrap;
  font-size:.8rem;color:var(--text-low);
}
.news-meta time{font-family:var(--font-mono)}
.news-side{display:flex;flex-direction:column;gap:1rem}
.news-compact{
  flex:1;background:var(--glass);border:1px solid var(--glass-border);
  border-radius:var(--radius-md);padding:1.15rem 1.25rem;
  display:flex;flex-direction:column;justify-content:center;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
  min-height:0;
}
.news-compact:hover{border-color:rgba(30,94,255,.4);background:rgba(255,255,255,.08);transform:translateX(4px)}
.news-compact__title{
  font-size:.95rem;font-weight:600;line-height:1.45;margin-bottom:.4rem;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-compact__title:hover{color:var(--brand-300)}
.news-compact p{
  font-size:.82rem;color:var(--text-mid);
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:.5rem;
}
.news-compact .news-meta{font-size:.75rem}
.news-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1.25rem}
.news-card{
  background:var(--glass);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);overflow:hidden;
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.22);box-shadow:var(--shadow-hover)}
.news-card__media{display:block;overflow:hidden;position:relative}
.news-card__media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  transition:transform .4s ease;
}
.news-card:hover .news-card__media img{transform:scale(1.05)}
.news-card__body{padding:1.15rem 1.25rem 1.35rem}
.news-card__body .badge{
  display:inline-block;font-size:.72rem;color:var(--cyan-glow);
  background:rgba(0,217,192,.08);border:1px solid rgba(0,217,192,.2);
  padding:.18rem .6rem;border-radius:999px;margin-bottom:.6rem;
}
.news-card__body h4{font-size:.95rem;font-weight:600;line-height:1.5;margin-bottom:.6rem}
.news-card__body h4 a:hover{color:var(--brand-300)}
.news-card__body .news-meta{font-size:.75rem}
.news-empty{
  background:var(--glass);border:1px dashed var(--glass-border);
  border-radius:var(--radius-lg);padding:3.5rem 2rem;text-align:center;
}
.news-empty__icon{
  font-size:2.5rem;color:var(--text-low);margin-bottom:1rem;
}
.news-empty p{color:var(--text-mid);margin-bottom:1.25rem}

/* ---------- Pricing ---------- */
.pricing-section{background:var(--bg-ink)}
.pricing-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1.5rem;align-items:stretch;max-width:1080px;margin:0 auto}
.price-card{
  background:var(--glass);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);padding:2.25rem 2rem;
  position:relative;display:flex;flex-direction:column;
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.price-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.2);box-shadow:var(--shadow-hover)}
.price-card .price-ribbon{
  position:absolute;top:-1px;left:50%;transform:translateX(-50%);
  background:linear-gradient(120deg,var(--brand-300),var(--cyan-glow));
  color:#06131a;font-size:.72rem;font-weight:700;
  padding:.25rem 1.25rem;border-radius:0 0 10px 10px;letter-spacing:.04em;
}
.price-card.recommended{
  border-color:rgba(0,217,192,.4);
  box-shadow:var(--shadow-hover),var(--glow-cyan);
  transform:scale(1.02);
}
.price-card.recommended:hover{transform:scale(1.02) translateY(-4px)}
.price-card.recommended::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--cyan-glow),transparent);
}
.price-card__plan{font-size:1.1rem;font-weight:600;margin-bottom:.25rem}
.price-card__audience{font-size:.82rem;color:var(--text-low);margin-bottom:1.5rem}
.price-card__price{
  font-family:var(--font-mono);font-size:2.75rem;font-weight:700;
  line-height:1.1;margin-bottom:.25rem;
}
.price-card__price span{font-size:1.1rem;color:var(--text-mid)}
.price-card__price .period{font-size:.85rem;color:var(--text-low);font-weight:400;font-family:var(--font-family)}
.price-card__features{list-style:none;margin:1.75rem 0 2rem;flex:1}
.price-card__features li{
  display:flex;align-items:flex-start;gap:.55rem;
  padding:.35rem 0;font-size:.88rem;color:var(--text-mid);
}
.price-card__features li i{
  color:var(--cyan-glow);font-size:.75rem;margin-top:.35rem;flex-shrink:0;
}
.price-card__features li.disabled i{color:var(--text-low)}
.price-card__features li.disabled{color:var(--text-low)}

/* ---------- FAQ ---------- */
.faq-section{background:var(--bg-deep);border-top:1px solid rgba(255,255,255,.05)}
.faq-list{max-width:780px;margin:0 auto}
.faq-item{
  background:var(--glass);border:1px solid var(--glass-border);
  border-radius:var(--radius-md);margin-bottom:.9rem;
  overflow:hidden;transition:border-color .2s ease;
}
.faq-item:hover{border-color:rgba(255,255,255,.2)}
.faq-item.is-active{border-color:rgba(30,94,255,.35)}
.faq-item__title{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem;
  background:transparent;border:0;text-align:left;cursor:pointer;
  color:var(--text-hi);font-size:1rem;font-weight:500;
  padding:1.25rem 1.5rem;
  transition:color .2s ease;
}
.faq-item__title:hover{color:var(--brand-300)}
.faq-item__title .faq-icon{
  flex-shrink:0;width:24px;height:24px;border-radius:6px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  color:var(--text-mid);font-size:.75rem;
  transition:transform .3s ease,background .3s ease,color .3s ease;
}
.faq-item.is-active .faq-icon{
  transform:rotate(45deg);background:rgba(30,94,255,.2);
  border-color:rgba(30,94,255,.4);color:var(--brand-300);
}
.faq-item__body{
  max-height:0;overflow:hidden;
  transition:max-height .35s ease;
}
.faq-item.is-active .faq-item__body{max-height:300px}
.faq-item__inner{
  padding:0 1.5rem 1.25rem;color:var(--text-mid);
  font-size:.9rem;line-height:1.7;
  border-top:1px solid rgba(255,255,255,.05);margin:0 1.5rem 0;
  padding-left:0;padding-right:0;
}
.faq-item__inner p{padding-top:1rem}

/* ---------- Final CTA ---------- */
.cta-final{
  position:relative;overflow:hidden;text-align:center;
  background:
    linear-gradient(rgba(6,10,19,.85),rgba(6,10,19,.9)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding:clamp(4rem,8vw,7rem) 0;
}
.cta-final::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:36px 36px;
  pointer-events:none;
}
.cta-panel{
  position:relative;z-index:2;max-width:720px;margin:0 auto;
  background:rgba(11,17,32,.6);backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.12);
  border-radius:24px;padding:3.5rem 2.5rem;
  box-shadow:var(--shadow-hover),var(--glow-brand);
}
.cta-panel::before,.cta-panel::after{
  content:'';position:absolute;width:12px;height:12px;
  border:2px solid var(--cyan-glow);opacity:.5;border-radius:3px;
}
.cta-panel::before{top:16px;left:16px;border-width:2px 0 0 2px;border-radius:3px 0 0 0}
.cta-panel::after{bottom:16px;right:16px;border-width:0 2px 2px 0;border-radius:0 0 3px 0}
.cta-panel h2{
  font-size:clamp(1.5rem,3vw,2.25rem);font-weight:600;
  margin-bottom:.75rem;
}
.cta-panel p{color:var(--text-mid);max-width:500px;margin:0 auto 1.75rem;font-size:.95rem}
.cta-actions{display:flex;align-items:center;justify-content:center;gap:1rem;flex-wrap:wrap}

/* ---------- Footer ---------- */
.site-footer{
  background:#04070D;border-top:1px solid rgba(255,255,255,.06);
  position:relative;
}
.site-footer::before{
  content:'';position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand-500),var(--cyan-glow),transparent);
}
.footer-main{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:2.5rem;
  padding:3.5rem 0 2.5rem;
}
.footer-brand .logo-brand{margin-bottom:1rem}
.footer-brand p{color:var(--text-mid);font-size:.875rem;line-height:1.6;max-width:280px}
.footer-social{display:flex;gap:.6rem;margin-top:1.25rem}
.footer-social a{
  width:36px;height:36px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);
  color:var(--text-mid);font-size:.85rem;
  transition:all .2s ease;
}
.footer-social a:hover{color:var(--cyan-glow);border-color:rgba(0,217,192,.4);box-shadow:var(--glow-cyan)}
.footer-col h4{
  font-size:.9rem;font-weight:600;color:var(--text-hi);
  margin-bottom:1rem;letter-spacing:.03em;
}
.footer-col ul li{margin-bottom:.45rem}
.footer-col ul a{color:var(--text-mid);font-size:.875rem;transition:color .2s ease}
.footer-col ul a:hover{color:var(--brand-300)}
.footer-newsletter p{color:var(--text-mid);font-size:.85rem;margin-bottom:.9rem;line-height:1.6}
.newsletter-form{display:flex;gap:.5rem}
.newsletter-form input{
  flex:1;height:40px;border-radius:10px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.1);
  color:var(--text-hi);padding:0 1rem;font-size:.85rem;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.newsletter-form input::placeholder{color:var(--text-low)}
.newsletter-form input:focus{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(30,94,255,.15);
  background:rgba(255,255,255,.1);
}
.newsletter-form input:-webkit-autofill,
.newsletter-form input:-webkit-autofill:hover,
.newsletter-form input:-webkit-autofill:focus{
  -webkit-text-fill-color:var(--text-hi);
  -webkit-box-shadow:0 0 0 1000px #0B1120 inset;
  transition:background-color 9999s ease-in-out 0s;
}
.newsletter-form button{
  height:40px;padding:0 1.25rem;border-radius:10px;
  background:linear-gradient(120deg,var(--brand-300),var(--brand-500));
  border:0;color:#fff;font-weight:600;font-size:.85rem;cursor:pointer;
  white-space:nowrap;transition:box-shadow .2s ease,transform .2s ease;
}
.newsletter-form button:hover{box-shadow:var(--glow-brand);transform:translateY(-1px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.05);
  padding:1.5rem 0;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem;
  color:var(--text-low);font-size:.8rem;
}
.footer-bottom a{color:var(--text-mid)}
.footer-bottom a:hover{color:var(--brand-300)}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .main-nav{display:none}
  .command-search{display:none}
  .header-tools .icon-btn{display:none}
  .header-cta{display:none}
  .hamburger{display:inline-flex}
  .hero{min-height:auto;padding:7rem 0 3.5rem}
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-card.wide{grid-column:span 2}
  .feature-strip{grid-template-columns:1fr}
  .scenario-block,.scenario-block:nth-child(even){grid-template-columns:1fr;gap:2rem}
  .scenario-block:nth-child(even) .scenario-media{order:0}
  .cases-grid{grid-template-columns:1fr}
  .news-top{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr 1fr}
  .pricing-grid{grid-template-columns:1fr;max-width:480px}
  .price-card.recommended{transform:none;box-shadow:var(--shadow-hover),var(--glow-cyan)}
  .price-card.recommended:hover{transform:none}
  .footer-main{grid-template-columns:1fr 1fr;gap:2rem}
  .footer-brand{grid-column:span 2}
}
@media (max-width:639px){
  .header-inner{padding:0 1rem}
  .logo-brand{font-size:1rem}
  .logo-brand__mark{width:32px;height:32px;font-size:.72rem}
  .hero h1{font-size:clamp(1.6rem,5.5vw,2rem)}
  .hero-sub{font-size:.95rem}
  .hero-actions .btn-primary,.hero-actions .btn-secondary{
    width:100%;justify-content:center;
  }
  .hero-stat{padding-right:1rem;margin-right:1rem}
  .hero-stat__num{font-size:1.15rem}
  .hero-stat__label{font-size:.7rem}
  .footer-main{grid-template-columns:1fr}
  .footer-brand{grid-column:span 1}
  .feature-grid{grid-template-columns:1fr}
  .feature-card.wide{grid-column:span 1}
  .news-grid{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr}
  .cta-panel{padding:2.5rem 1.25rem}
  .cta-actions .btn-primary,.cta-actions .btn-secondary{width:100%;justify-content:center}
  .newsletter-form{flex-direction:column}
  .newsletter-form button{width:100%}
  .footer-bottom{flex-direction:column;gap:1rem;text-align:center}
}

/* roulang page: article */
:root {
      --bg-ink: #060A13;
      --bg-deep: #0B1120;
      --glass: rgba(255, 255, 255, 0.055);
      --glass-border: rgba(255, 255, 255, 0.12);
      --brand-500: #1E5EFF;
      --brand-300: #4D8DFF;
      --cyan-glow: #00D9C0;
      --warn: #FFB547;
      --danger: #FF5A6A;
      --text-hi: rgba(255, 255, 255, 0.92);
      --text-mid: rgba(255, 255, 255, 0.66);
      --text-low: rgba(255, 255, 255, 0.42);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 10px;
      --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5);
      --glow-brand: 0 0 24px rgba(30, 94, 255, 0.45);
      --glow-cyan: 0 0 24px rgba(0, 217, 192, 0.35);
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
      --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", Consolas, monospace;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-ink);
      color: var(--text-hi);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul, ol {
      list-style: none;
    }

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

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

    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 68px;
      background: rgba(6, 10, 19, 0.78);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      z-index: 100;
    }

    .header-inner {
      height: 68px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
    }

    .logo-brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.2px;
      color: var(--text-hi);
      flex-shrink: 0;
    }

    .logo-brand__mark {
      font-family: var(--font-mono);
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--cyan-glow);
      background: rgba(0, 217, 192, 0.1);
      border: 1px solid rgba(0, 217, 192, 0.25);
      padding: 2px 8px;
      border-radius: 8px;
      text-shadow: 0 0 12px rgba(0, 217, 192, 0.45);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .main-nav a {
      position: relative;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-mid);
      padding: 8px 2px;
      transition: color 0.25s ease;
    }

    .main-nav a:hover {
      color: var(--text-hi);
    }

    .main-nav a.active {
      color: var(--text-hi);
    }

    .main-nav a.active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -2px;
      height: 2px;
      background: linear-gradient(90deg, var(--brand-300), var(--cyan-glow));
      border-radius: 2px;
      box-shadow: 0 0 12px rgba(0, 217, 192, 0.5);
    }

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

    .header-actions .btn {
      padding: 9px 18px;
      font-size: 0.875rem;
      border-radius: var(--radius-sm);
    }

    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: var(--glass);
      border: 1px solid var(--glass-border);
      color: var(--text-hi);
      font-size: 1.1rem;
      transition: all 0.25s ease;
    }

    .nav-toggle:hover {
      border-color: var(--brand-300);
      box-shadow: var(--glow-brand);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 68px;
      left: 0;
      right: 0;
      background: rgba(6, 10, 19, 0.96);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--glass-border);
      padding: 16px 20px 24px;
      z-index: 99;
      flex-direction: column;
      gap: 4px;
    }

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

    .mobile-menu a {
      display: block;
      padding: 14px 16px;
      border-radius: var(--radius-md);
      font-size: 1.0625rem;
      color: var(--text-hi);
      font-weight: 500;
    }

    .mobile-menu a:hover,
    .mobile-menu a.active {
      background: rgba(30, 94, 255, 0.15);
      color: var(--brand-300);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 24px;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      line-height: 1.2;
      white-space: nowrap;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: linear-gradient(120deg, var(--brand-300), var(--brand-500));
      color: #fff;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 4px 12px rgba(30, 94, 255, 0.25);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 0 28px rgba(30, 94, 255, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.25);
      color: #fff;
    }

    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .btn-secondary {
      background: var(--glass);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: rgba(255, 255, 255, 0.92);
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.16);
      border-color: rgba(255, 255, 255, 0.22);
      color: #fff;
    }

    .btn:focus-visible,
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--cyan-glow);
      outline-offset: 3px;
    }

    .article-hero {
      position: relative;
      padding: 140px 0 72px;
      background-image: url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .article-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(6, 10, 19, 0.88) 0%, rgba(6, 10, 19, 0.78) 100%);
    }

    .article-hero::after {
      content: "";
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
      background-size: 42px 42px;
      pointer-events: none;
    }

    .article-hero .container {
      position: relative;
      z-index: 1;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--text-low);
      margin-bottom: 24px;
    }

    .breadcrumb a {
      color: var(--text-mid);
      transition: color 0.25s ease;
    }

    .breadcrumb a:hover {
      color: var(--brand-300);
    }

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

    .breadcrumb .sep {
      color: var(--text-low);
      opacity: 0.5;
    }

    .article-title {
      font-size: clamp(1.8rem, 4vw, 2.8rem);
      font-weight: 700;
      line-height: 1.25;
      max-width: 900px;
      color: var(--text-hi);
      margin-bottom: 18px;
    }

    .article-meta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      font-size: 0.875rem;
      color: var(--text-mid);
    }

    .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--glass);
      border: 1px solid var(--glass-border);
      border-radius: 999px;
      padding: 5px 14px;
      font-size: 0.8125rem;
      color: var(--text-mid);
    }

    .meta-item i {
      color: var(--cyan-glow);
      font-size: 0.75rem;
    }

    .meta-category {
      color: var(--brand-300);
      border-color: rgba(30, 94, 255, 0.3);
    }

    .article-main {
      padding: 64px 0 56px;
      background: var(--bg-ink);
    }

    .article-body {
      max-width: 720px;
      margin: 0 auto;
      font-size: 1.0625rem;
      line-height: 1.85;
      color: var(--text-hi);
    }

    .article-body p {
      margin: 0 0 1.5em;
    }

    .article-body h2 {
      font-size: 1.65rem;
      margin: 2.2em 0 0.9em;
      padding-left: 14px;
      border-left: 3px solid var(--brand-500);
      line-height: 1.3;
    }

    .article-body h3 {
      font-size: 1.3rem;
      margin: 1.8em 0 0.7em;
      color: rgba(255, 255, 255, 0.9);
    }

    .article-body ul,
    .article-body ol {
      margin: 1.2em 0;
      padding-left: 1.4em;
    }

    .article-body ul li::marker {
      color: var(--cyan-glow);
    }

    .article-body ol li::marker {
      color: var(--brand-300);
    }

    .article-body li {
      margin-bottom: 0.5em;
    }

    .article-body a {
      color: var(--brand-300);
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .article-body blockquote {
      border-left: 3px solid var(--cyan-glow);
      background: var(--glass);
      padding: 1.2em 1.5em;
      margin: 1.8em 0;
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      color: var(--text-mid);
    }

    .article-body img {
      border-radius: var(--radius-lg);
      width: 100%;
      height: auto;
      margin: 1.5em 0;
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    }

    .article-body figure {
      margin: 1.8em 0;
    }

    .article-body figcaption {
      font-size: 0.85rem;
      color: var(--text-low);
      text-align: center;
      margin-top: 0.6em;
    }

    .article-empty {
      max-width: 720px;
      margin: 0 auto;
      text-align: center;
      padding: 80px 24px;
    }

    .article-empty i {
      font-size: 3rem;
      color: var(--text-low);
      margin-bottom: 20px;
    }

    .article-empty h2 {
      font-size: 1.5rem;
      margin-bottom: 10px;
      color: var(--text-hi);
    }

    .article-empty p {
      color: var(--text-mid);
      margin-bottom: 28px;
    }

    .article-bottom {
      max-width: 720px;
      margin: 48px auto 0;
      padding-top: 36px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .article-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 36px;
    }

    .article-tags .tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.8125rem;
      font-weight: 500;
      color: var(--text-mid);
      background: var(--glass);
      border: 1px solid var(--glass-border);
      transition: all 0.25s ease;
    }

    .article-tags .tag:hover {
      color: var(--cyan-glow);
      border-color: rgba(0, 217, 192, 0.4);
      box-shadow: var(--glow-cyan);
    }

    .article-pager {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .pager-link {
      display: flex;
      flex-direction: column;
      gap: 4px;
      max-width: 260px;
      transition: all 0.25s ease;
    }

    .pager-link:hover .pager-title {
      color: var(--brand-300);
    }

    .pager-link.pager-next {
      text-align: right;
      align-items: flex-end;
    }

    .pager-label {
      font-size: 0.75rem;
      color: var(--text-low);
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .pager-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-mid);
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      transition: color 0.25s ease;
    }

    .related-section {
      padding: 72px 0;
      background: var(--bg-deep);
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

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

    .section-head h2 {
      font-size: clamp(1.5rem, 3vw, 2rem);
      font-weight: 700;
      color: var(--text-hi);
    }

    .section-head p {
      color: var(--text-mid);
      font-size: 0.95rem;
      max-width: 460px;
    }

    .related-card {
      background: var(--glass);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: all 0.3s ease;
      position: relative;
      height: 100%;
      display: flex;
      flex-direction: column;
    }

    .related-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), transparent);
      border-radius: 0 0 40px 0;
      z-index: 1;
      pointer-events: none;
    }

    .related-card:hover {
      transform: translateY(-4px);
      border-color: rgba(255, 255, 255, 0.22);
      box-shadow: var(--shadow-hover), 0 0 24px rgba(30, 94, 255, 0.2);
    }

    .related-card__media {
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }

    .related-card__media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.45s ease;
    }

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

    .related-card__body {
      padding: 20px 22px 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .related-card__body h4 {
      font-size: 1.0625rem;
      font-weight: 600;
      line-height: 1.5;
      margin-bottom: 12px;
      color: var(--text-hi);
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      transition: color 0.25s ease;
    }

    .related-card:hover .related-card__body h4 {
      color: var(--brand-300);
    }

    .related-card__date {
      font-family: var(--font-mono);
      font-size: 0.8125rem;
      color: var(--text-low);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: auto;
    }

    .cta-band {
      position: relative;
      padding: 88px 0;
      text-align: center;
      overflow: hidden;
      background: var(--bg-ink);
    }

    .cta-band::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(600px 300px at 50% 100%, rgba(30, 94, 255, 0.25), transparent),
        radial-gradient(400px 200px at 20% 0%, rgba(0, 217, 192, 0.12), transparent);
    }

    .cta-band .container {
      position: relative;
      z-index: 1;
    }

    .cta-panel {
      max-width: 760px;
      margin: 0 auto;
      background: var(--glass);
      border: 1px solid var(--glass-border);
      border-radius: 24px;
      padding: 56px 40px;
      position: relative;
      box-shadow: var(--shadow-card);
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      top: -1px;
      left: -1px;
      right: -1px;
      height: 2px;
      background: linear-gradient(90deg, var(--brand-500), var(--cyan-glow), var(--brand-500));
      border-radius: 24px 24px 0 0;
    }

    .cta-panel h2 {
      font-size: clamp(1.7rem, 3.4vw, 2.4rem);
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-hi);
    }

    .cta-panel p {
      font-size: 1.05rem;
      color: var(--text-mid);
      margin-bottom: 32px;
    }

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

    .site-footer {
      background: #04070E;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 72px 0 0;
      position: relative;
    }

    .site-footer::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 217, 192, 0.3), transparent);
    }

    .footer-main {
      display: grid;
      grid-template-columns: 1.6fr 0.8fr 1fr 1.4fr;
      gap: 48px;
      padding-bottom: 48px;
    }

    .footer-brand p {
      color: var(--text-mid);
      font-size: 0.9rem;
      margin: 16px 0 20px;
      max-width: 300px;
    }

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

    .footer-social a {
      width: 40px;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      background: var(--glass);
      border: 1px solid var(--glass-border);
      color: var(--text-mid);
      font-size: 0.95rem;
      transition: all 0.25s ease;
    }

    .footer-social a:hover {
      color: var(--cyan-glow);
      border-color: rgba(0, 217, 192, 0.4);
      box-shadow: var(--glow-cyan);
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-hi);
      margin-bottom: 20px;
    }

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

    .footer-col ul a {
      color: var(--text-mid);
      font-size: 0.9rem;
      transition: all 0.25s ease;
    }

    .footer-col ul a:hover {
      color: var(--brand-300);
      padding-left: 4px;
    }

    .footer-newsletter p {
      color: var(--text-mid);
      font-size: 0.9rem;
      margin-bottom: 16px;
    }

    .newsletter-form {
      display: flex;
      gap: 10px;
    }

    .newsletter-form input {
      flex: 1;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 11px 16px;
      color: var(--text-hi);
      font-size: 0.9rem;
      transition: all 0.25s ease;
      min-width: 0;
    }

    .newsletter-form input:focus {
      outline: none;
      border-color: var(--brand-300);
      box-shadow: 0 0 12px rgba(30, 94, 255, 0.25);
    }

    .newsletter-form input::placeholder {
      color: var(--text-low);
    }

    .newsletter-form button {
      background: linear-gradient(120deg, var(--brand-300), var(--brand-500));
      color: #fff;
      border-radius: var(--radius-md);
      padding: 11px 20px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .newsletter-form button:hover {
      box-shadow: 0 0 24px rgba(30, 94, 255, 0.5);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 24px 0 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      color: var(--text-low);
      font-size: 0.875rem;
    }

    @media (max-width: 1023px) {
      .main-nav {
        display: none;
      }

      .nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
      }

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

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

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

    @media (max-width: 767px) {
      .article-hero {
        padding: 120px 0 56px;
      }

      .article-title {
        font-size: 1.6rem;
      }

      .footer-main {
        grid-template-columns: 1fr;
        gap: 36px;
      }

      .footer-brand p {
        max-width: 100%;
      }
    }

    @media (max-width: 639px) {
      .related-grid {
        grid-template-columns: 1fr;
      }

      .article-pager {
        flex-direction: column;
        align-items: stretch;
      }

      .pager-link.pager-next {
        text-align: left;
        align-items: flex-start;
      }

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

      .section-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }

      .article-meta {
        gap: 8px;
      }

      .newsletter-form {
        flex-direction: column;
      }
    }

/* roulang page: category1 */
:root {
  --bg-ink: #060A13;
  --bg-deep: #0B1120;
  --glass: rgba(255, 255, 255, 0.055);
  --glass-hover: rgba(255, 255, 255, 0.09);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-hover: rgba(255, 255, 255, 0.22);
  --brand-500: #1E5EFF;
  --brand-300: #4D8DFF;
  --cyan-glow: #00D9C0;
  --warn: #FFB547;
  --danger: #FF5A6A;
  --text-hi: rgba(255, 255, 255, 0.92);
  --text-mid: rgba(255, 255, 255, 0.66);
  --text-low: rgba(255, 255, 255, 0.42);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5);
  --glow-brand: 0 0 24px rgba(30, 94, 255, 0.45);
  --glow-cyan: 0 0 24px rgba(0, 217, 192, 0.35);
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", monospace;
  --header-h: 68px;
  --section-pad: clamp(4.5rem, 8vw, 7rem) 0;
  --section-pad-mobile: 3rem 0;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  background: var(--bg-ink);
  color: var(--text-hi);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--brand-300);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--cyan-glow);
}

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

ul, ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--cyan-glow);
  outline-offset: 3px;
}

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

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(6, 10, 19, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}

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

.logo-brand__mark {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--cyan-glow);
  background: rgba(0, 217, 192, 0.1);
  border: 1px solid rgba(0, 217, 192, 0.3);
  border-radius: 8px;
  padding: 4px 8px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-shadow: 0 0 12px rgba(0, 217, 192, 0.4);
}

.logo-brand span:last-child {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-hi);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: 8px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-mid);
  position: relative;
  padding: 6px 2px;
  transition: color 0.2s ease;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-300), var(--cyan-glow));
  border-radius: 999px;
  transition: width 0.3s ease;
}

.main-nav a:hover {
  color: var(--text-hi);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.main-nav a.active {
  color: var(--text-hi);
}

.main-nav a.active::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--cyan-glow);
  box-shadow: 0 0 8px var(--cyan-glow);
}

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

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  width: 200px;
  height: 38px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box:focus-within {
  border-color: rgba(30, 94, 255, 0.6);
  box-shadow: 0 0 0 3px rgba(30, 94, 255, 0.2);
}

.search-box i {
  font-size: 0.8rem;
  color: var(--text-low);
  flex-shrink: 0;
}

.search-box input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-hi);
  font-size: 0.85rem;
  min-width: 0;
}

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

.kbd-hint {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-low);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 5px;
  padding: 1px 6px;
  flex-shrink: 0;
}

.search-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-deep);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all 0.2s ease;
  z-index: 50;
}

.search-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.search-panel a {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-mid);
  transition: background 0.2s ease, color 0.2s ease;
}

.search-panel a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-hi);
}

.search-panel a i {
  margin-right: 8px;
  font-size: 0.8rem;
  color: var(--brand-300);
}

.nav-cta {
  white-space: nowrap;
}

.icon-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-mid);
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  color: var(--cyan-glow);
  border-color: rgba(0, 217, 192, 0.4);
  box-shadow: var(--glow-cyan);
}

.nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-hi);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s ease;
}

.nav-toggle:hover {
  border-color: rgba(30, 94, 255, 0.5);
  box-shadow: var(--glow-brand);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: rgba(6, 10, 19, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 20px 24px;
  flex-direction: column;
  gap: 4px;
  z-index: 99;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  display: block;
  padding: 14px 12px;
  font-size: 1.125rem;
  color: var(--text-mid);
  border-radius: 10px;
  transition: background 0.2s ease, color 0.2s ease;
}

.mobile-menu a:hover,
.mobile-menu a.active {
  background: rgba(30, 94, 255, 0.12);
  color: var(--text-hi);
}

.mobile-menu .btn {
  margin-top: 12px;
  text-align: center;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(120deg, var(--brand-300), var(--brand-500));
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 4px 16px rgba(30, 94, 255, 0.3);
}

.btn-primary:hover {
  box-shadow: var(--glow-brand), 0 8px 20px rgba(30, 94, 255, 0.4);
  transform: translateY(-1px);
  color: #fff;
}

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

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.92);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.24);
  color: #fff;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--brand-300);
  font-weight: 600;
  font-size: 0.95rem;
  transition: gap 0.2s ease, color 0.2s ease;
}

.text-link:hover {
  gap: 10px;
  color: var(--cyan-glow);
}

/* ===== Hero ===== */
.category-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(3rem, 7vh, 5rem)) 0 clamp(3.5rem, 7vh, 5.5rem);
  background: url('/assets/images/backpic/back-1.png') center 30%/cover no-repeat;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(6, 10, 19, 0.94) 0%, rgba(6, 10, 19, 0.82) 40%, rgba(6, 10, 19, 0.55) 100%);
  z-index: 1;
}

.category-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 30% 50%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 50%, black 0%, transparent 75%);
  z-index: 1;
}

.hero-glow-left {
  position: absolute;
  left: -120px;
  top: 20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(30, 94, 255, 0.25) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}

.hero-glow-right {
  position: absolute;
  right: -80px;
  bottom: 0;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 217, 192, 0.12) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-low);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-mid);
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--brand-300);
}

.breadcrumb i {
  font-size: 0.7rem;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: rgba(0, 217, 192, 0.1);
  border: 1px solid rgba(0, 217, 192, 0.3);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--cyan-glow);
  margin-bottom: 22px;
  letter-spacing: 0.02em;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-glow);
  position: relative;
  animation: pulse 1.6s ease infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 217, 192, 0.6); }
  70% { box-shadow: 0 0 0 10px rgba(0, 217, 192, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 217, 192, 0); }
}

.category-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-hi);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.category-hero h1 .accent {
  color: var(--cyan-glow);
  text-shadow: 0 0 30px rgba(0, 217, 192, 0.3);
}

.hero-sub {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-mid);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 44px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
}

.hero-stat {
  padding: 0 32px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stat:first-child {
  border-left: none;
  padding-left: 0;
}

.hero-stat .num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-hi);
  line-height: 1.2;
}

.hero-stat .num .unit {
  font-size: 0.95rem;
  color: var(--cyan-glow);
  margin-left: 2px;
}

.hero-stat .label {
  font-size: 0.85rem;
  color: var(--text-low);
  margin-top: 4px;
}

/* ===== Sections ===== */
.section {
  padding: var(--section-pad);
  position: relative;
}

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

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

.section-head {
  margin-bottom: 48px;
  max-width: 720px;
}

.section-head .section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--cyan-glow);
  background: rgba(0, 217, 192, 0.08);
  border: 1px solid rgba(0, 217, 192, 0.2);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-hi);
  margin-bottom: 14px;
}

.section-head p {
  font-size: 1.025rem;
  color: var(--text-mid);
  line-height: 1.7;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ===== Alternate blocks ===== */
.alt-block {
  padding: var(--section-pad);
}

.alt-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.alt-grid.reverse .alt-image {
  order: 2;
}

.alt-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.alt-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.alt-image:hover img {
  transform: scale(1.03);
}

.alt-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(6, 10, 19, 0.5) 100%);
  pointer-events: none;
}

.alt-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cyan-glow);
  background: rgba(6, 10, 19, 0.7);
  border: 1px solid rgba(0, 217, 192, 0.3);
  border-radius: 999px;
  padding: 4px 12px;
  backdrop-filter: blur(8px);
  letter-spacing: 0.05em;
}

.alt-text h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-hi);
  margin-bottom: 18px;
}

.alt-text > p {
  font-size: 1rem;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 22px;
}

.alt-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.alt-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.96rem;
  color: var(--text-mid);
  line-height: 1.65;
}

.alt-list li i {
  color: var(--cyan-glow);
  font-size: 0.8rem;
  margin-top: 6px;
  flex-shrink: 0;
}

/* ===== Sub-topic cards ===== */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.topic-card {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  overflow: hidden;
}

.topic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-300), var(--cyan-glow));
  border-radius: 999px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.topic-card:hover {
  background: var(--glass-hover);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-hover), 0 0 40px rgba(30, 94, 255, 0.08);
  transform: translateY(-3px);
}

.topic-card:hover::before {
  opacity: 1;
}

.topic-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(30, 94, 255, 0.12);
  border: 1px solid rgba(30, 94, 255, 0.25);
  color: var(--brand-300);
  font-size: 1.15rem;
  margin-bottom: 20px;
  transition: all 0.3s ease;
}

.topic-card:hover .topic-icon {
  color: var(--cyan-glow);
  background: rgba(0, 217, 192, 0.1);
  border-color: rgba(0, 217, 192, 0.35);
  box-shadow: var(--glow-cyan);
}

.topic-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 10px;
}

.topic-card p {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 18px;
}

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-mid);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 3px 12px;
  transition: all 0.2s ease;
}

.tag:hover {
  color: var(--cyan-glow);
  border-color: rgba(0, 217, 192, 0.35);
}

/* ===== Guide cards ===== */
.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.guide-card {
  background: var(--bg-deep);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.guide-card:hover {
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow-hover);
}

.guide-card__header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.guide-card__header i {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  font-size: 1rem;
  background: rgba(0, 217, 192, 0.1);
  border: 1px solid rgba(0, 217, 192, 0.25);
  color: var(--cyan-glow);
  flex-shrink: 0;
}

.guide-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-hi);
}

.guide-card ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.guide-card ul li {
  position: relative;
  padding-left: 20px;
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.7;
}

.guide-card ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--brand-300);
  border-radius: 2px;
  transform: rotate(45deg);
}

.guide-card ul li strong {
  color: var(--text-hi);
  font-weight: 600;
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

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

.faq-item[open] {
  border-color: rgba(0, 217, 192, 0.35);
  box-shadow: 0 0 30px rgba(0, 217, 192, 0.05);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-hi);
  list-style: none;
  transition: color 0.2s ease;
}

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

.faq-item summary:hover {
  color: var(--brand-300);
}

.faq-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-mid);
  font-size: 0.8rem;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.faq-item[open] .faq-icon {
  background: rgba(0, 217, 192, 0.12);
  border-color: rgba(0, 217, 192, 0.35);
  color: var(--cyan-glow);
  transform: rotate(45deg);
}

.faq-item[open] summary {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.faq-content {
  padding: 18px 24px 22px;
}

.faq-content p {
  font-size: 0.96rem;
  color: var(--text-mid);
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: var(--section-pad);
  overflow: hidden;
}

.cta-panel {
  position: relative;
  background: linear-gradient(135deg, rgba(14, 21, 38, 0.92), rgba(6, 10, 19, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: clamp(3rem, 7vw, 5rem) clamp(1.5rem, 4vw, 4rem);
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.cta-panel::before {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  top: -40%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(30, 94, 255, 0.2) 0%, transparent 65%);
  pointer-events: none;
}

.cta-panel::after {
  content: "";
  position: absolute;
  left: 30%;
  right: 30%;
  bottom: -50%;
  height: 70%;
  background: radial-gradient(ellipse, rgba(0, 217, 192, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.cta-panel > * {
  position: relative;
  z-index: 2;
}

.cta-panel h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 16px;
  line-height: 1.2;
}

.cta-panel .cta-sub {
  font-size: 1.125rem;
  color: var(--text-mid);
  max-width: 520px;
  margin: 0 auto 32px;
  line-height: 1.75;
}

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

.cta-note {
  margin-top: 20px;
  font-size: 0.83rem;
  color: var(--text-low);
}

/* ===== Footer ===== */
.site-footer {
  background: #04070D;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 0;
}

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

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.65;
  margin: 16px 0 20px;
}

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

.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-mid);
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.footer-social a:hover {
  color: var(--cyan-glow);
  border-color: rgba(0, 217, 192, 0.35);
  box-shadow: var(--glow-cyan);
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 18px;
}

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

.footer-col ul a {
  font-size: 0.875rem;
  color: var(--text-mid);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col ul a:hover {
  color: var(--brand-300);
  padding-left: 4px;
}

.footer-newsletter p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.65;
  margin-bottom: 16px;
}

.newsletter-form {
  display: flex;
  gap: 8px;
}

.newsletter-form input {
  flex: 1;
  min-width: 0;
  height: 42px;
  padding: 0 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-hi);
  font-size: 0.875rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.newsletter-form input::placeholder {
  color: var(--text-low);
}

.newsletter-form input:focus {
  border-color: rgba(30, 94, 255, 0.6);
  box-shadow: 0 0 0 3px rgba(30, 94, 255, 0.2);
}

.newsletter-form input:-webkit-autofill,
.newsletter-form input:-webkit-autofill:hover,
.newsletter-form input:-webkit-autofill:focus {
  -webkit-box-shadow: 0 0 0 1000px #0B1120 inset;
  -webkit-text-fill-color: #fff;
  caret-color: #fff;
}

.newsletter-form button {
  height: 42px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, var(--brand-300), var(--brand-500));
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(30, 94, 255, 0.3);
}

.newsletter-form button:hover {
  box-shadow: var(--glow-brand);
  transform: translateY(-1px);
}

.newsletter-form button:active {
  transform: translateY(0);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
  color: var(--text-low);
}

/* ===== Animations ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  animation: fadeUp 0.7s ease both;
}

.fade-up.delay-1 {
  animation-delay: 0.08s;
}

.fade-up.delay-2 {
  animation-delay: 0.16s;
}

.fade-up.delay-3 {
  animation-delay: 0.24s;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .main-nav {
    display: none;
  }

  .search-box {
    width: 160px;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }

  .alt-grid {
    gap: 32px;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 767px) {
  :root {
    --section-pad: var(--section-pad-mobile);
  }

  .header-inner {
    gap: 12px;
  }

  .search-box {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }

  .category-hero {
    padding-top: calc(var(--header-h) + 2.5rem);
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .hero-stat {
    padding-left: 0;
    border-left: none;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .hero-stat:first-child {
    border-top: none;
    padding-top: 0;
  }

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

  .alt-grid.reverse .alt-image {
    order: 0;
  }

  .alt-image img {
    height: 220px;
  }

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

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

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

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

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

@media (max-width: 519px) {
  .container {
    padding: 0 16px;
  }

  .logo-brand span:last-child {
    font-size: 0.95rem;
  }

  .logo-brand__mark {
    font-size: 0.95rem;
    padding: 3px 6px;
  }

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

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

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-form button {
    width: 100%;
  }
}