/* roulang page: index */
:root{
  --bg-0:#0b1120;
  --bg-1:#0f172a;
  --bg-2:#16213e;
  --brand:#2dd4bf;
  --brand-2:#22d3ee;
  --accent:#fb7185;
  --orange:#f97316;
  --text:#e2e8f0;
  --muted:rgba(226,232,240,.55);
  --border:rgba(255,255,255,.12);
  --glass:rgba(255,255,255,.05);
  --radius-lg:24px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow-glow:0 0 24px rgba(34,211,238,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:radial-gradient(circle at 75% 0%,rgba(34,211,238,.10),transparent 42%),linear-gradient(180deg,#0b1120 0%,#16213e 54%,#0b1120 100%);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid #22d3ee;outline-offset:3px;border-radius:8px}
::selection{background:rgba(45,212,191,.3);color:#fff}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:640px){.container{padding:0 16px}}

/* ========== Header ========== */
.site-header{
  position:fixed;top:0;left:0;width:100%;z-index:60;
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,box-shadow .3s;
}
.site-header .container{
  display:flex;align-items:center;justify-content:space-between;height:78px;
}
.site-header.scrolled{
  background:rgba(11,17,32,.78);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom-color:rgba(255,255,255,.08);
  box-shadow:0 8px 32px rgba(0,0,0,.35);
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-size:20px;font-weight:800;color:#fff;letter-spacing:.2px;
}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,#2dd4bf,#22d3ee);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 18px rgba(34,211,238,.35);
  font-size:17px;font-weight:900;color:#0b1120;
}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;padding:9px 16px;border-radius:999px;
  font-size:15px;font-weight:500;color:rgba(226,232,240,.75);
  transition:color .2s,background .2s;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-links a.active{color:#22d3ee;font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  bottom:4px;width:18px;height:2px;border-radius:2px;background:#22d3ee;
  box-shadow:0 0 8px rgba(34,211,238,.8);
}
.btn-login{
  padding:9px 20px;border-radius:999px;
  background:linear-gradient(135deg,#2dd4bf,#22d3ee);
  color:#0b1120;font-weight:700;font-size:14px;
  box-shadow:0 0 16px rgba(34,211,238,.25);
  transition:box-shadow .2s,transform .2s;
}
.btn-login:hover{box-shadow:0 0 28px rgba(34,211,238,.5);transform:translateY(-1px)}
.btn-login:active{transform:scale(.97)}
.nav-burger{
  display:none;background:transparent;border:1px solid rgba(255,255,255,.16);
  border-radius:10px;padding:9px 10px;cursor:pointer;color:#e2e8f0;
}
.nav-burger svg{width:20px;height:20px}
@media(max-width:900px){
  .nav-links{
    position:fixed;top:78px;left:16px;right:16px;
    background:rgba(15,23,42,.94);
    backdrop-filter:blur(24px);
    -webkit-backdrop-filter:blur(24px);
    border:1px solid rgba(255,255,255,.1);
    border-radius:20px;padding:16px;flex-direction:column;align-items:stretch;gap:4px;
    transform:translateY(-14px);opacity:0;visibility:hidden;
    transition:transform .25s,opacity .25s,visibility .25s;
  }
  .nav-links.open{transform:translateY(0);opacity:1;visibility:visible}
  .nav-links a{padding:13px 16px;border-radius:12px}
  .nav-burger{display:flex}
  .btn-login{margin-left:auto;margin-right:12px}
}

/* ========== Hero ========== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:150px 0 90px;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center top;
  z-index:-3;
}
.hero-overlay{
  position:absolute;inset:0;z-index:-2;
  background:linear-gradient(90deg,rgba(11,17,32,.97) 0%,rgba(11,17,32,.88) 45%,rgba(11,17,32,.52) 100%);
}
.hero-overlay::after{
  content:"";position:absolute;right:-140px;top:-90px;
  width:520px;height:520px;
  background:radial-gradient(circle,rgba(34,211,238,.26),transparent 65%);
  pointer-events:none;
}
.hero-content{max-width:740px;position:relative;z-index:1}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 15px;border-radius:999px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.14);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  font-size:13px;font-weight:600;color:#e2e8f0;margin-bottom:22px;
}
.hero-badge .dot{
  width:7px;height:7px;border-radius:50%;background:#fb7185;
  box-shadow:0 0 0 4px rgba(251,113,133,.16);
}
.hero h1{
  font-size:46px;line-height:1.16;font-weight:800;color:#fff;
  margin:0 0 16px;letter-spacing:0;
}
.hero-sub{
  font-size:17px;color:rgba(226,232,240,.82);
  max-width:570px;margin:0 0 30px;
}
.countdown-card{
  display:inline-flex;align-items:center;gap:4px;flex-wrap:wrap;
  padding:12px 20px;margin-bottom:28px;border-radius:999px;
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.15);
  box-shadow:0 8px 32px rgba(0,0,0,.25);
}
.live-label{
  display:flex;align-items:center;gap:7px;
  font-size:13px;font-weight:800;color:#fb7185;margin-right:12px;
}
.live-label .pulse{
  width:7px;height:7px;border-radius:50%;background:#fb7185;
  animation:pulse 1.2s infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
.cd-item{display:flex;flex-direction:column;align-items:center;padding:0 10px}
.cd-item .num{
  font-size:30px;font-weight:800;color:#fb7185;line-height:1;
  font-variant-numeric:tabular-nums;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  text-shadow:0 0 16px rgba(251,113,133,.35);
}
.cd-item .label{font-size:11px;color:rgba(226,232,240,.55);margin-top:4px}
.cd-sep{color:rgba(255,255,255,.35);font-size:22px;font-weight:300;padding-bottom:12px}
.hero-points{
  list-style:none;padding:0;margin:0 0 28px;
  display:flex;flex-direction:column;gap:10px;
}
.hero-points li{
  display:flex;align-items:center;gap:10px;
  font-size:15px;color:rgba(226,232,240,.9);
}
.hero-points .tick{
  width:22px;height:22px;border-radius:50%;flex-shrink:0;
  background:rgba(45,212,191,.15);color:#2dd4bf;
  display:flex;align-items:center;justify-content:center;font-size:12px;
}
.remind-form{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.remind-form input{
  flex:1 1 240px;min-width:0;height:48px;border-radius:14px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  color:#fff;padding:0 16px;font-size:15px;outline:none;transition:all .2s;
}
.remind-form input::placeholder{color:rgba(226,232,240,.45)}
.remind-form input:focus{border-color:#22d3ee;box-shadow:0 0 0 4px rgba(34,211,238,.12)}
.remind-form input.error{border-color:#f87171;box-shadow:0 0 0 4px rgba(248,113,113,.12)}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 28px;border-radius:14px;border:none;cursor:pointer;
  background:linear-gradient(135deg,#2dd4bf,#22d3ee);
  color:#0b1120;font-size:15px;font-weight:800;
  box-shadow:0 0 20px rgba(34,211,238,.30);
  transition:box-shadow .2s,transform .2s,background .2s;
}
.btn-primary:hover{box-shadow:0 0 32px rgba(34,211,238,.52);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.98)}
.btn-primary.subscribed{background:#2dd4bf;color:#0b1120;box-shadow:0 0 20px rgba(45,212,191,.4)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 24px;
  border-radius:14px;border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.04);color:#fff;font-size:14px;font-weight:600;
  cursor:pointer;backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:background .2s,border-color .2s,transform .2s;
}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:scale(.98)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.remind-msg{font-size:14px;margin:0 0 10px;min-height:20px;color:#f87171}
.remind-msg.ok{color:#2dd4bf}
@media(max-width:640px){
  .hero{padding-top:115px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:15px}
  .countdown-card{padding:10px 12px;gap:2px}
  .cd-item{padding:0 7px}
  .cd-item .num{font-size:22px}
  .cd-sep{padding-bottom:9px}
}

/* ========== Section base ========== */
.section{padding:90px 0;position:relative}
.section-head{margin-bottom:40px}
.section-head.center{text-align:center}
.section-title{font-size:32px;font-weight:800;color:#fff;margin:0 0 10px}
.section-sub{color:rgba(226,232,240,.7);margin:0;font-size:16px}
@media(max-width:640px){.section{padding:50px 0}.section-title{font-size:26px}}

/* ========== News list ========== */
.news-panel{
  background:rgba(255,255,255,.02);
  border:1px solid rgba(255,255,255,.06);
  border-radius:28px;padding:36px;
}
.news-list{display:flex;flex-direction:column;gap:16px}
.news-card{
  display:flex;gap:20px;padding:18px;border-radius:22px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(45,212,191,.4);box-shadow:0 18px 40px rgba(0,0,0,.3)}
.news-thumb{
  width:190px;height:124px;border-radius:16px;overflow:hidden;flex-shrink:0;
  background:linear-gradient(135deg,#16213e,#1e3a8a);
  display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,.25);font-weight:800;font-size:18px;
}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}
.news-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:rgba(226,232,240,.5)}
.news-meta .cat{color:#2dd4bf;background:rgba(45,212,191,.12);padding:2px 9px;border-radius:999px;font-size:12px}
.news-title{font-size:18px;font-weight:700;color:#fff;margin:0;line-height:1.45}
.news-summary{font-size:14px;color:rgba(226,232,240,.65);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-link{margin-top:auto;align-self:flex-end;color:#22d3ee;font-size:14px;font-weight:600;transition:color .2s}
.news-link:hover{color:#2dd4bf}
.empty-state{padding:50px 20px;text-align:center;border:1px dashed rgba(255,255,255,.14);border-radius:22px;color:rgba(226,232,240,.55);background:rgba(255,255,255,.02)}
.empty-state .icon{font-size:36px;margin-bottom:10px;opacity:.7}
@media(max-width:768px){
  .news-panel{padding:20px}
  .news-card{flex-direction:column;gap:14px}
  .news-thumb{width:100%;height:170px}
}

/* ========== Category cards ========== */
.category-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:24px}
.cat-card{
  position:relative;isolation:isolate;
  border-radius:24px;overflow:hidden;min-height:300px;
  padding:34px;display:flex;flex-direction:column;justify-content:flex-end;
  border:1px solid rgba(255,255,255,.12);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(45,212,191,.45);box-shadow:0 18px 40px rgba(0,0,0,.32)}
.cat-card .cat-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:-2}
.cat-card::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(11,17,32,.3) 0%,rgba(11,17,32,.94) 100%);
}
.cat-card h2{font-size:26px;font-weight:800;color:#fff;margin:0 0 10px;position:relative;z-index:1}
.cat-card p{font-size:14px;color:rgba(226,232,240,.82);margin:0;position:relative;z-index:1;max-width:420px}
.cat-enter{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:#22d3ee;font-weight:700;font-size:14px;position:relative;z-index:1}
.cat-enter:hover{color:#2dd4bf}
@media(max-width:900px){.category-grid{grid-template-columns:1fr}.cat-card{min-height:250px}}

/* ========== Feature strip ========== */
.feature-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  border:1px solid rgba(34,211,238,.25);border-radius:24px;padding:24px;
  background:rgba(11,17,32,.55);
}
.feature-item{
  display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:16px;
  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);
}
.feature-item .ico{
  width:38px;height:38px;border-radius:10px;flex-shrink:0;
  background:rgba(34,211,238,.15);color:#22d3ee;
  display:flex;align-items:center;justify-content:center;
}
.feature-item span{font-size:14px;font-weight:600;color:#e2e8f0}
@media(max-width:900px){.feature-strip{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.feature-strip{grid-template-columns:1fr}}

/* ========== FAQ ========== */
.faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{border-radius:18px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);overflow:hidden;transition:border-color .2s}
.faq-item.open{border-color:rgba(45,212,191,.35)}
.faq-toggle{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:18px 22px;background:transparent;border:none;color:#e2e8f0;
  font-size:16px;font-weight:600;cursor:pointer;text-align:left;
}
.faq-toggle .icon{
  flex-shrink:0;width:28px;height:28px;border-radius:50%;
  background:rgba(45,212,191,.14);color:#2dd4bf;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;transition:transform .25s;
}
.faq-item.open .faq-toggle .icon{transform:rotate(45deg)}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-panel p{padding:0 22px 20px;margin:0;color:rgba(226,232,240,.72);font-size:15px}

/* ========== CTA ========== */
.cta-card{
  position:relative;overflow:hidden;border-radius:28px;padding:56px 40px;text-align:center;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 18% 0%,rgba(45,212,191,.2),transparent 46%);
  pointer-events:none;
}
.cta-title{font-size:30px;font-weight:800;color:#fff;margin:0 0 24px;position:relative}
.btn-lg{height:56px;padding:0 38px;font-size:16px}
@media(max-width:640px){.cta-card{padding:40px 20px}.cta-title{font-size:24px}}

/* ========== Footer ========== */
.site-footer{
  border-top:1px solid rgba(255,255,255,.08);
  padding:58px 0 30px;margin-top:30px;
  background:rgba(11,17,32,.55);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:42px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand .logo{font-size:19px;margin-bottom:14px;color:#fff}
.footer-brand p{font-size:14px;color:rgba(226,232,240,.55);margin:0;max-width:360px}
.site-footer h4{font-size:14px;color:#fff;margin:0 0 14px;font-weight:700}
.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(226,232,240,.55);transition:color .2s}
.footer-links a:hover{color:#2dd4bf}
.footer-copy{padding-top:28px;display:flex;flex-direction:column;gap:6px;align-items:center;text-align:center;font-size:13px;color:rgba(226,232,240,.4)}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr;gap:26px}}

/* roulang page: article */
:root {
  --bg-deep: #0b1120;
  --bg-mid: #111a30;
  --bg-soft: #16213e;
  --accent-teal: #2dd4bf;
  --accent-cyan: #22d3ee;
  --accent-rose: #fb7185;
  --text-main: #e8edf7;
  --text-weak: #94a3b8;
  --border-soft: rgba(255, 255, 255, 0.10);
  --border-solid: rgba(255, 255, 255, 0.16);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-strong: rgba(255, 255, 255, 0.08);
  --radius-card: 22px;
  --radius-btn: 13px;
  --radius-pill: 999px;
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.35);
  --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.35);
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 55% 38% at 88% -4%, rgba(34, 211, 238, 0.12), transparent 72%),
    radial-gradient(ellipse 40% 30% at 8% 14%, rgba(45, 212, 191, 0.07), transparent 70%);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }
ul, ol { list-style: none; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: 6px;
}
.container {
  max-width: 1200px !important;
  width: 100%;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 17, 32, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(11, 17, 32, 0.92);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: #fff;
  white-space: nowrap;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.22), rgba(34, 211, 238, 0.14));
  border: 1px solid rgba(45, 212, 191, 0.5);
  color: var(--accent-teal);
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.25);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-links a {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: #c6d0e3;
  padding: 6px 2px;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-teal), var(--accent-cyan));
  box-shadow: 0 0 12px rgba(45, 212, 191, 0.6);
}
.btn-login {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  color: #06231f;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-cyan));
  box-shadow: var(--glow-cyan);
  transition: var(--transition);
}
.btn-login:hover {
  filter: brightness(1.12);
  box-shadow: 0 0 34px rgba(34, 211, 238, 0.5);
  transform: translateY(-1px);
}
.btn-login:active { transform: scale(0.98); }
.nav-burger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border-solid);
  color: #fff;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
}
.nav-burger:hover { background: rgba(255, 255, 255, 0.09); }

/* ===== Article Page ===== */
.article-page {
  position: relative;
  background:
    radial-gradient(ellipse 42% 32% at 15% 8%, rgba(45, 212, 191, 0.07), transparent 70%),
    radial-gradient(ellipse 45% 30% at 86% 20%, rgba(34, 211, 238, 0.08), transparent 70%);
  padding-bottom: 24px;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-weak);
  padding: 28px 0 0;
}
.breadcrumb a { color: var(--text-weak); }
.breadcrumb a:hover { color: var(--accent-cyan); }
.breadcrumb .sep { color: rgba(255, 255, 255, 0.28); }
.breadcrumb .current-cat { color: var(--accent-teal); }
.breadcrumb .current {
  color: #c6d0e3;
  max-width: 52ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-banner {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  padding: 48px 48px 42px;
  margin-top: 30px;
  background-image:
    linear-gradient(135deg, rgba(11, 17, 32, 0.92), rgba(22, 33, 62, 0.82)),
    url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow: var(--shadow-card);
}
.article-banner::before {
  content: "";
  position: absolute;
  right: -70px;
  top: -90px;
  width: 290px;
  height: 290px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.20), transparent 68%);
  pointer-events: none;
}
.article-banner::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-teal), var(--accent-cyan));
  opacity: 0.85;
}
.article-banner .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(45, 212, 191, 0.14);
  border: 1px solid rgba(45, 212, 191, 0.38);
  color: var(--accent-teal);
  font-size: 12.5px;
  font-weight: 600;
  position: relative;
  z-index: 1;
}
.article-banner h1 {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.32;
  color: #fff;
  letter-spacing: 0.01em;
  margin: 16px 0 20px;
  position: relative;
  z-index: 1;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  color: var(--text-weak);
  font-size: 13.5px;
  position: relative;
  z-index: 1;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item svg { opacity: 0.7; }
.article-layout {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 56px;
}
.article-content {
  font-size: 15.5px;
  line-height: 1.75;
  color: #dbe2ee;
  background: var(--glass-bg);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  padding: 34px 38px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin: 2em 0 0.85em;
  line-height: 1.35;
}
.article-content h3 {
  font-size: 19px;
  font-weight: 600;
  color: #fff;
  margin: 1.7em 0 0.6em;
}
.article-content p {
  margin: 0 0 1.1em;
}
.article-content ul {
  margin: 0 0 1.2em 0.4em;
  padding: 0;
}
.article-content ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 0.45em;
}
.article-content ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-cyan));
  box-shadow: 0 0 8px rgba(45, 212, 191, 0.5);
}
.article-content ol {
  margin: 0 0 1.2em 1.2em;
  padding: 0;
  list-style: decimal;
}
.article-content ol li {
  margin-bottom: 0.45em;
  padding-left: 0.2em;
}
.article-content blockquote {
  border-left: 3px solid var(--accent-cyan);
  background: rgba(34, 211, 238, 0.06);
  padding: 14px 18px;
  border-radius: 0 12px 12px 0;
  margin: 1.4em 0;
  color: #c6d0e3;
}
.article-content a {
  color: var(--accent-cyan);
  border-bottom: 1px solid transparent;
}
.article-content a:hover { border-bottom-color: var(--accent-cyan); }
.article-content img {
  border-radius: 16px;
  margin: 1.4em 0;
  border: 1px solid var(--border-soft);
}
.article-content hr {
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin: 2em 0;
}
.article-content strong { color: #fff; font-weight: 600; }
.article-content figure {
  margin: 1.5em 0;
}
.article-content figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--text-weak);
  margin-top: 8px;
}

/* ===== Related ===== */
.related-section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 8px 20px 72px;
}
.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 26px;
}
.section-title::before {
  content: "";
  width: 4px;
  height: 22px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--accent-teal), var(--accent-cyan));
  box-shadow: 0 0 12px rgba(45, 212, 191, 0.5);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  display: flex;
  flex-direction: column;
  border-radius: 18px;
  overflow: hidden;
  background: var(--glass-bg);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 212, 191, 0.45);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.38);
}
.related-card img {
  width: 100%;
  height: 132px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-soft);
}
.related-card-body {
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 8px;
}
.related-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  line-height: 1.4;
}
.related-card-body p {
  font-size: 13.5px;
  color: var(--text-weak);
  line-height: 1.6;
  flex: 1;
}
.related-card-body .more {
  font-size: 13px;
  color: var(--accent-cyan);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.back-wrap {
  text-align: center;
  margin-top: 42px;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 28px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-solid);
  background: rgba(255, 255, 255, 0.04);
  color: #dbe2ee;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.10);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}
.btn-ghost:active { transform: scale(0.98); }

/* ===== Not found ===== */
.not-found {
  text-align: center;
  padding: 90px 24px;
  margin: 40px 20px 60px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px dashed var(--border-solid);
  backdrop-filter: blur(12px);
}
.not-found svg {
  margin: 0 auto 18px;
  color: var(--accent-cyan);
  opacity: 0.7;
}
.not-found h2 {
  font-size: 21px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.not-found p {
  color: var(--text-weak);
  margin-bottom: 24px;
}

/* ===== Footer ===== */
.site-footer {
  background: rgba(8, 13, 26, 0.92);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 56px 0 26px;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(45, 212, 191, 0.4), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 16px; font-size: 18px; }
.footer-brand p {
  color: var(--text-weak);
  font-size: 14px;
  max-width: 340px;
  line-height: 1.7;
}
.site-footer h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: var(--text-weak);
  font-size: 14px;
}
.footer-links a:hover { color: var(--accent-cyan); }
.footer-copy {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 13px;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 14px 20px 20px;
    gap: 4px;
    background: rgba(11, 17, 32, 0.97);
    border-bottom: 1px solid var(--border-soft);
    display: none;
    z-index: 49;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 14px; border-radius: 10px; }
  .nav-links a:hover { background: rgba(255, 255, 255, 0.06); }
  .nav-links a.active { background: rgba(45, 212, 191, 0.1); color: var(--accent-teal); }
  .nav-links a.active::after { display: none; }
  .nav-burger { display: inline-flex; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 768px) {
  .article-banner {
    padding: 36px 26px 30px;
    margin-top: 20px;
  }
  .article-content {
    padding: 26px 22px;
  }
  .article-layout {
    padding-top: 36px;
  }
  .breadcrumb {
    padding-top: 20px;
  }
  .breadcrumb .current {
    max-width: 36ch;
  }
}
@media (max-width: 560px) {
  .related-grid { grid-template-columns: 1fr; }
  .article-banner { padding: 30px 20px 26px; }
  .article-banner h1 { font-size: 24px; }
  .footer-copy {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    gap: 6px;
  }
  .btn-login {
    padding: 8px 16px;
    font-size: 13px;
  }
  .logo {
    font-size: 18px;
  }
  .article-content {
    padding: 22px 18px;
  }
}

/* roulang page: category1 */
:root {
    --bg-deep: #0b1120;
    --bg-main: #101a30;
    --bg-panel: rgba(255, 255, 255, 0.05);
    --bg-panel-strong: rgba(255, 255, 255, 0.08);
    --border-glass: rgba(255, 255, 255, 0.12);
    --border-glass-light: rgba(255, 255, 255, 0.16);
    --text-main: #f1f5f9;
    --text-dim: #9fb0c7;
    --cyan: #22d3ee;
    --teal: #2dd4bf;
    --orange: #fb7185;
    --radius-lg: 22px;
    --radius-md: 14px;
    --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.35);
    --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.25);
    --transition: all .25s ease;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-main);
    background:
      radial-gradient(1100px 500px at 85% -5%, rgba(34, 211, 238, 0.09), transparent 60%),
      radial-gradient(800px 400px at 0% 20%, rgba(45, 212, 191, 0.06), transparent 55%),
      linear-gradient(180deg, #101a30 0%, #0b1120 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button {
    font-family: inherit;
    cursor: pointer;
  }

  input {
    font-family: inherit;
    outline: none;
  }

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

  /* ============ Header ============ */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 17, 32, 0.72);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: box-shadow .3s ease, background .3s ease;
  }

  .site-header.scrolled {
    background: rgba(11, 17, 32, 0.88);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  }

  .site-header .container {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 72px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: .5px;
    white-space: nowrap;
  }

  .logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: linear-gradient(135deg, #2dd4bf, #22d3ee);
    color: #06202a;
    box-shadow: 0 0 18px rgba(34, 211, 238, 0.45);
    flex-shrink: 0;
  }

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

  .nav-links a {
    padding: 8px 16px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dim);
    transition: var(--transition);
    position: relative;
  }

  .nav-links a:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
  }

  .nav-links a.active {
    color: var(--cyan);
    background: rgba(34, 211, 238, 0.08);
  }

  .nav-links a.active::after {
    content: '';
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 2px;
    height: 2px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--teal), var(--cyan));
    box-shadow: 0 0 8px rgba(34, 211, 238, 0.7);
  }

  .btn-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 22px;
    border-radius: 999px;
    background: linear-gradient(135deg, #2dd4bf, #22d3ee);
    color: #06202a;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 0 18px rgba(34, 211, 238, 0.3);
    transition: var(--transition);
    white-space: nowrap;
  }

  .btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 28px rgba(34, 211, 238, 0.5);
    filter: brightness(1.1);
  }

  .nav-burger {
    display: none;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 12px;
    padding: 8px;
    color: var(--text-main);
    line-height: 0;
    transition: var(--transition);
  }

  .nav-burger:hover {
    background: rgba(255, 255, 255, 0.12);
  }

  .mobile-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 99;
    background: rgba(11, 17, 32, 0.96);
    backdrop-filter: blur(24px);
    padding: 16px 24px 24px;
    flex-direction: column;
    gap: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

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

  .mobile-nav a {
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-dim);
    transition: var(--transition);
  }

  .mobile-nav a:hover,
  .mobile-nav a.active {
    color: var(--cyan);
    background: rgba(34, 211, 238, 0.08);
  }

  .mobile-nav .btn-login {
    margin-top: 8px;
  }

  /* ============ Hero ============ */
  .page-hero {
    position: relative;
    min-height: 62vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 100px 0 80px;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    z-index: 0;
  }

  .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(11, 17, 32, 0.92) 20%, rgba(11, 17, 32, 0.55) 60%, rgba(11, 17, 32, 0.35) 100%);
    z-index: 1;
  }

  .hero-glow {
    position: absolute;
    right: -10%;
    bottom: -20%;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.2), transparent 65%);
    z-index: 2;
    pointer-events: none;
  }

  .hero-inner {
    position: relative;
    z-index: 3;
    max-width: 700px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(16px);
    font-size: 13px;
    font-weight: 600;
    color: #e2e8f0;
    letter-spacing: .5px;
    margin-bottom: 22px;
  }

  .hero-badge .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--orange);
    box-shadow: 0 0 10px rgba(251, 113, 133, 0.8);
    animation: pulse-dot 1.6s ease infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.4); opacity: .7; }
  }

  .hero-inner h1 {
    font-size: 42px;
    line-height: 1.25;
    font-weight: 800;
    margin: 0 0 18px;
    letter-spacing: 1px;
  }

  .hero-inner h1 span.gradient-text {
    background: linear-gradient(90deg, #2dd4bf, #22d3ee);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .hero-sub {
    font-size: 17px;
    color: #cbd5e1;
    line-height: 1.8;
    margin: 0 0 30px;
    max-width: 580px;
  }

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

  /* ============ Buttons ============ */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #2dd4bf, #22d3ee);
    color: #06202a;
    padding: 13px 30px;
    border: none;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 700;
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
  }

  .btn-primary:hover {
    filter: brightness(1.12);
    box-shadow: 0 0 34px rgba(34, 211, 238, 0.5);
    transform: translateY(-2px);
  }

  .btn-primary:active,
  .btn-secondary:active,
  .btn-login:active {
    transform: scale(0.98);
  }

  .btn-primary:focus-visible,
  .btn-secondary:focus-visible,
  .btn-login:focus-visible,
  .nav-burger:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.16);
    backdrop-filter: blur(12px);
    color: #f1f5f9;
    padding: 13px 30px;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
  }

  .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
  }

  /* ============ Guide main ============ */
  .guide-main {
    padding: 80px 24px;
    position: relative;
  }

  .guide-cols {
    display: grid;
    grid-template-columns: 1.7fr 1fr;
    gap: 48px;
    align-items: start;
  }

  .content-block {
    margin-bottom: 44px;
  }

  .block-title {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 8px;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .block-title .title-line {
    width: 4px;
    height: 22px;
    background: linear-gradient(180deg, #2dd4bf, #22d3ee);
    border-radius: 4px;
    box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
  }

  .block-desc {
    color: var(--text-dim);
    font-size: 15px;
    margin: 0 0 20px;
  }

  .content-block p {
    color: #cbd5e1;
    font-size: 15px;
    line-height: 1.8;
    margin: 0 0 16px;
  }

  .prep-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
  }

  .prep-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 14px;
    color: #e2e8f0;
    transition: var(--transition);
  }

  .prep-item:hover {
    border-color: rgba(34, 211, 238, 0.5);
    background: rgba(34, 211, 238, 0.06);
  }

  .prep-item svg {
    flex-shrink: 0;
    color: var(--teal);
  }

  .steps-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
  }

  .steps-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 18px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    transition: var(--transition);
  }

  .steps-item:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.18);
    transform: translateX(4px);
  }

  .step-num {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(45, 212, 191, 0.2), rgba(34, 211, 238, 0.2));
    border: 1px solid rgba(34, 211, 238, 0.3);
    font-weight: 800;
    font-size: 14px;
    color: var(--cyan);
  }

  .steps-item p {
    margin: 0;
    font-size: 15px;
    color: #e2e8f0;
  }

  .steps-item p small {
    display: block;
    color: var(--text-dim);
    font-size: 13px;
    margin-top: 2px;
  }

  .do-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 16px;
  }

  .do-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    font-size: 14px;
    color: #e2e8f0;
    transition: var(--transition);
  }

  .do-item:hover {
    border-color: rgba(45, 212, 191, 0.4);
    background: rgba(45, 212, 191, 0.05);
  }

  .do-item svg {
    flex-shrink: 0;
    color: var(--teal);
  }

  /* ============ Side cards ============ */
  .guide-side {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 100px;
  }

  .side-card {
    padding: 26px 24px;
    border-radius: var(--radius-lg);
    background: var(--bg-panel);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
  }

  .side-card:hover {
    border-color: rgba(255, 255, 255, 0.22);
    transform: translateY(-3px);
  }

  .side-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 16px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .side-card h3 .card-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(34, 211, 238, 0.12);
    color: var(--cyan);
  }

  .mini-steps {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .mini-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
  }

  .mini-step .num {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, #2dd4bf, #22d3ee);
    color: #06202a;
    font-size: 12px;
    font-weight: 800;
  }

  .mini-step p {
    margin: 0;
    font-size: 14px;
    color: #e2e8f0;
    line-height: 1.6;
  }

  .tips-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .tips-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: #cbd5e1;
    line-height: 1.6;
  }

  .tips-list li svg {
    flex-shrink: 0;
    margin-top: 3px;
    color: var(--orange);
  }

  /* ============ Flow section ============ */
  .flow-section {
    padding: 80px 24px;
    position: relative;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
  }

  .flow-section::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 600px;
    height: 300px;
    transform: translateX(-50%);
    background: radial-gradient(ellipse, rgba(34, 211, 238, 0.08), transparent 70%);
    pointer-events: none;
  }

  .section-head {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
  }

  .section-head h2 {
    font-size: 30px;
    font-weight: 800;
    margin: 0 0 12px;
  }

  .section-head p {
    color: var(--text-dim);
    font-size: 15px;
    max-width: 520px;
    margin: 0 auto;
  }

  .flow-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    position: relative;
    max-width: 1040px;
    margin: 0 auto;
  }

  .flow-step {
    padding: 28px 22px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(16px);
    text-align: center;
    transition: var(--transition);
    position: relative;
  }

  .flow-step:hover {
    transform: translateY(-5px);
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  }

  .flow-step .flow-ico {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(45, 212, 191, 0.15), rgba(34, 211, 238, 0.15));
    border: 1px solid rgba(34, 211, 238, 0.25);
    color: var(--cyan);
  }

  .flow-step h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 8px;
  }

  .flow-step p {
    margin: 0;
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.6;
  }

  .flow-step .step-tag {
    position: absolute;
    top: -11px;
    left: 50%;
    transform: translateX(-50%);
    padding: 3px 14px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    color: #06202a;
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
  }

  /* ============ Scene section ============ */
  .scene-section {
    padding: 80px 24px;
  }

  .scene-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .scene-card {
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(16px);
    transition: var(--transition);
  }

  .scene-card.wide {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: stretch;
  }

  .scene-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34, 211, 238, 0.35);
    box-shadow: var(--shadow-card);
  }

  .scene-img-wrap {
    position: relative;
    min-height: 190px;
    flex-shrink: 0;
  }

  .scene-card:not(.wide) .scene-img-wrap {
    height: 190px;
  }

  .scene-card.wide .scene-img-wrap {
    width: 42%;
    min-height: 220px;
  }

  .scene-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
  }

  .scene-img-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(11, 17, 32, 0.65));
  }

  .scene-text {
    padding: 26px 24px;
    flex: 1;
  }

  .scene-text h3 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 10px;
  }

  .scene-text p {
    margin: 0;
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.75;
  }

  .scene-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
  }

  .scene-tags span {
    padding: 4px 14px;
    border-radius: 999px;
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.2);
    font-size: 12px;
    color: #a5f3fc;
  }

  /* ============ FAQ ============ */
  .faq-section {
    padding: 80px 24px;
  }

  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .faq-item {
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(12px);
    overflow: hidden;
    transition: var(--transition);
  }

  .faq-item.open {
    border-color: rgba(34, 211, 238, 0.35);
    background: rgba(255, 255, 255, 0.06);
  }

  .faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    user-select: none;
    font-size: 16px;
    font-weight: 600;
    color: #f1f5f9;
    transition: var(--transition);
  }

  .faq-q:hover {
    color: var(--cyan);
  }

  .faq-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(34, 211, 238, 0.1);
    color: var(--cyan);
    transition: transform .3s ease, background .3s ease;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: rgba(34, 211, 238, 0.2);
  }

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

  .faq-a-inner {
    padding: 0 24px 20px;
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.8;
  }

  /* ============ CTA ============ */
  .cta-section {
    padding: 40px 24px 100px;
  }

  .cta-panel {
    max-width: 960px;
    margin: 0 auto;
    padding: 52px 48px;
    border-radius: 28px;
    background:
      radial-gradient(600px 200px at 80% 0%, rgba(34, 211, 238, 0.12), transparent 60%),
      rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    text-align: center;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
  }

  .cta-panel::before {
    content: '';
    position: absolute;
    left: -20%;
    top: -50%;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(45, 212, 191, 0.15), transparent 65%);
    pointer-events: none;
  }

  .cta-panel h2 {
    font-size: 28px;
    font-weight: 800;
    margin: 0 0 12px;
  }

  .cta-panel p {
    color: var(--text-dim);
    font-size: 15px;
    margin: 0 0 28px;
  }

  .cta-form {
    display: flex;
    gap: 12px;
    max-width: 520px;
    margin: 0 auto;
  }

  .cta-input {
    flex: 1;
    padding: 13px 18px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: #f1f5f9;
    font-size: 14px;
    transition: var(--transition);
  }

  .cta-input::placeholder {
    color: #7e8ea8;
  }

  .cta-input:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2);
  }

  .cta-input.error {
    border-color: #f87171;
    box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2);
  }

  .cta-btn {
    padding: 13px 28px;
    border-radius: 14px;
    border: none;
    background: linear-gradient(135deg, var(--orange), #f97316);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    box-shadow: 0 0 24px rgba(251, 113, 133, 0.35);
    transition: var(--transition);
    white-space: nowrap;
  }

  .cta-btn:hover {
    filter: brightness(1.12);
    box-shadow: 0 0 32px rgba(251, 113, 133, 0.5);
    transform: translateY(-2px);
  }

  .cta-btn.success {
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    box-shadow: 0 0 24px rgba(45, 212, 191, 0.4);
  }

  .cta-note {
    margin-top: 16px;
    font-size: 12px;
    color: #7e8ea8;
  }

  /* ============ Footer ============ */
  .site-footer {
    padding: 68px 24px 28px;
    background: rgba(7, 11, 22, 0.7);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-footer .container {
    max-width: 1200px;
    margin: 0 auto;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 44px;
  }

  .footer-brand .logo {
    margin-bottom: 14px;
    font-size: 17px;
  }

  .footer-brand p {
    margin: 0;
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.8;
    max-width: 340px;
  }

  .site-footer h4 {
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 16px;
    color: #e2e8f0;
  }

  .footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

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

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

  .footer-copy {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    color: #64748b;
    font-size: 13px;
  }

  /* ============ Responsive ============ */
  @media (max-width: 1024px) {
    .guide-cols {
      grid-template-columns: 1.4fr 1fr;
      gap: 32px;
    }

    .flow-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
  }

  @media (max-width: 768px) {
    .site-header .container {
      height: 64px;
    }

    .nav-links {
      display: none;
    }

    .site-header .btn-login {
      display: none;
    }

    .nav-burger {
      display: inline-flex;
      margin-left: auto;
    }

    .mobile-nav {
      top: 64px;
    }

    .page-hero {
      min-height: auto;
      padding: 70px 0 60px;
    }

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

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

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

    .btn-primary,
    .btn-secondary {
      width: 100%;
    }

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

    .guide-side {
      position: static;
    }

    .do-list {
      grid-template-columns: 1fr;
    }

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

    .scene-card.wide {
      flex-direction: column;
    }

    .scene-card.wide .scene-img-wrap {
      width: 100%;
      height: 200px;
    }

    .cta-panel {
      padding: 36px 24px;
    }

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

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

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

    .footer-copy {
      flex-direction: column;
      gap: 8px;
      text-align: center;
    }
  }

  @media (max-width: 520px) {
    .section-head h2 {
      font-size: 24px;
    }

    .hero-inner h1 {
      font-size: 27px;
    }

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

    .cta-panel {
      padding: 30px 18px;
      border-radius: 20px;
    }

    .cta-panel h2 {
      font-size: 21px;
    }

    .footer-copy {
      font-size: 12px;
    }
  }

/* roulang page: category2 */
:root {
    --bg-deep: #0b1120;
    --bg-base: #0f172a;
    --bg-soft: #16213e;
    --primary: #2dd4bf;
    --cyan: #22d3ee;
    --accent: #fb7185;
    --orange: #f97316;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --border: rgba(255,255,255,0.10);
    --border-strong: rgba(255,255,255,0.16);
    --glass-bg: rgba(255,255,255,0.04);
    --glass-bg-hover: rgba(255,255,255,0.08);
    --radius-lg: 24px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-glow: 0 0 24px rgba(34,211,238,0.35);
    --shadow-card: 0 8px 30px rgba(0,0,0,0.25);
    --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-sans);
    background: var(--bg-deep);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

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

  a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.25s ease;
  }

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

  button {
    font-family: var(--font-sans);
    cursor: pointer;
    border: none;
    background: none;
  }

  input {
    font-family: var(--font-sans);
  }

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  @media (max-width: 640px) {
    .container {
      padding: 0 18px;
    }
  }

  /* ===== Header / Nav ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 17, 32, 0.72);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: background 0.3s ease, box-shadow 0.3s ease;
  }

  .site-header.scrolled {
    background: rgba(11, 17, 32, 0.88);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  }

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

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

  .logo:hover {
    color: var(--primary);
  }

  .logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(45,212,191,0.25), rgba(34,211,238,0.15));
    border: 1px solid rgba(45,212,191,0.4);
    color: var(--primary);
    box-shadow: 0 0 16px rgba(45,212,191,0.2);
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0 auto;
  }

  .nav-links a {
    position: relative;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dim);
    transition: all 0.25s ease;
  }

  .nav-links a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.06);
  }

  .nav-links a.active {
    color: var(--primary);
    background: rgba(45,212,191,0.12);
  }

  .nav-links a.active::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 2px;
    transform: translateX(-50%);
    width: 18px;
    height: 3px;
    border-radius: 99px;
    background: var(--primary);
  }

  .btn-login {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    color: #062824;
    font-size: 14px;
    font-weight: 700;
    box-shadow: var(--shadow-glow);
    transition: all 0.25s ease;
    flex-shrink: 0;
  }

  .btn-login:hover {
    color: #062824;
    filter: brightness(1.1);
    box-shadow: 0 0 30px rgba(34,211,238,0.5);
    transform: translateY(-1px);
  }

  .btn-login:active {
    transform: scale(0.97);
  }

  .btn-login:focus-visible,
  .nav-links a:focus-visible,
  .btn-primary:focus-visible,
  .btn-secondary:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 2px;
  }

  .nav-burger {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    align-items: center;
    justify-content: center;
    color: var(--text);
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.05);
    z-index: 120;
  }

  @media (max-width: 900px) {
    .nav-links {
      position: fixed;
      top: 0;
      right: -100%;
      width: 280px;
      height: 100vh;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
      padding: 100px 28px 40px;
      background: rgba(11, 17, 32, 0.97);
      backdrop-filter: blur(28px);
      border-left: 1px solid var(--border);
      transition: right 0.35s cubic-bezier(0.22, 1, 0.36, 1);
      margin: 0;
      z-index: 110;
    }

    .nav-links.open {
      right: 0;
    }

    .nav-links a {
      width: 100%;
      padding: 14px 16px;
      font-size: 16px;
      border-radius: 12px;
    }

    .nav-links a.active::after {
      display: none;
    }

    .nav-burger {
      display: inline-flex;
    }

    .btn-login {
      display: none;
    }
  }

  @media (max-width: 420px) {
    .site-header .container {
      height: 64px;
      gap: 12px;
    }

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

  /* ===== Buttons ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    color: #062824;
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.3px;
    box-shadow: var(--shadow-glow);
    transition: all 0.28s ease;
    border: none;
  }

  .btn-primary:hover {
    filter: brightness(1.12);
    color: #062824;
    box-shadow: 0 0 34px rgba(34,211,238,0.55);
    transform: translateY(-2px);
  }

  .btn-primary:active {
    transform: scale(0.97);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-strong);
    color: var(--text);
    font-size: 15px;
    font-weight: 600;
    backdrop-filter: blur(12px);
    transition: all 0.28s ease;
  }

  .btn-secondary:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.35);
    color: var(--text);
    transform: translateY(-2px);
  }

  .btn-secondary:active {
    transform: scale(0.97);
  }

  /* ===== Badge / Tags ===== */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    background: rgba(45,212,191,0.15);
    border: 1px solid rgba(45,212,191,0.35);
    color: var(--primary);
    backdrop-filter: blur(10px);
  }

  .badge-live {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    background: rgba(251,113,133,0.1);
    border: 1px solid rgba(251,113,133,0.3);
  }

  .badge-live .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
    animation: pulse-dot 1.6s ease-in-out infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
  }

  .tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    color: var(--cyan);
    background: rgba(34,211,238,0.08);
    border: 1px solid rgba(34,211,238,0.25);
  }

  /* ===== Section spacing ===== */
  .section {
    position: relative;
    padding: 90px 0;
  }

  .section-title {
    font-size: 30px;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text);
    margin-bottom: 16px;
  }

  .section-subtitle {
    font-size: 16px;
    color: var(--text-dim);
    max-width: 560px;
    margin-bottom: 40px;
    line-height: 1.75;
  }

  @media (max-width: 768px) {
    .section {
      padding: 55px 0;
    }
    .section-title {
      font-size: 24px;
    }
  }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    min-height: 560px;
    display: flex;
    align-items: center;
    padding: 90px 0 80px;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(11,17,32,0.95) 20%, rgba(11,17,32,0.70) 55%, rgba(11,17,32,0.35) 100%);
  }

  .hero::after {
    content: '';
    position: absolute;
    right: -10%;
    bottom: -30%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(34,211,238,0.25) 0%, rgba(34,211,238,0) 65%);
    pointer-events: none;
  }

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

  .hero h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.25;
    color: #fff;
    margin: 20px 0 16px;
    letter-spacing: 1px;
  }

  .hero p.lead {
    font-size: 17px;
    color: rgba(226,232,240,0.85);
    max-width: 520px;
    line-height: 1.8;
    margin-bottom: 32px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 36px;
  }

  @media (max-width: 768px) {
    .hero {
      min-height: auto;
      padding: 64px 0 56px;
    }
    .hero h1 {
      font-size: 32px;
    }
    .hero p.lead {
      font-size: 15px;
    }
    .hero-actions {
      flex-direction: column;
      align-items: stretch;
    }
    .hero-actions .btn-primary,
    .hero-actions .btn-secondary {
      width: 100%;
    }
  }

  /* ===== Glass card ===== */
  .glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
  }

  .glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--border-strong);
    transform: translateY(-4px);
  }

  /* ===== Split layout (category page core) ===== */
  .split-layout {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    align-items: start;
  }

  .split-main h2 {
    font-size: 30px;
    font-weight: 800;
    line-height: 1.35;
    margin-bottom: 18px;
    color: var(--text);
  }

  .split-main p {
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 18px;
    font-size: 15px;
  }

  .split-side {
    position: sticky;
    top: 100px;
  }

  @media (max-width: 900px) {
    .split-layout {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .split-side {
      position: static;
    }
  }

  /* ===== Feature list ===== */
  .feature-check-list {
    list-style: none;
    margin: 24px 0 0;
    padding: 0;
    display: grid;
    gap: 14px;
  }

  .feature-check-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(255,255,255,0.035);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 14px;
    font-size: 15px;
    color: var(--text);
    transition: all 0.25s ease;
  }

  .feature-check-list li:hover {
    border-color: rgba(45,212,191,0.3);
    background: rgba(45,212,191,0.05);
  }

  .feature-check-list .icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    margin-top: 2px;
    color: var(--primary);
  }

  /* ===== Steps ===== */
  .steps-wrap {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 40px;
  }

  .step-item {
    position: relative;
    padding: 36px 28px 32px;
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
    border: 1px solid var(--border);
    backdrop-filter: blur(14px);
    transition: all 0.3s ease;
  }

  .step-item:hover {
    border-color: rgba(45,212,191,0.35);
    transform: translateY(-4px);
  }

  .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(45,212,191,0.2), rgba(34,211,238,0.1));
    border: 1px solid rgba(45,212,191,0.35);
    color: var(--primary);
    font-weight: 800;
    font-size: 16px;
    margin-bottom: 18px;
  }

  .step-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
  }

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

  @media (max-width: 768px) {
    .steps-wrap {
      grid-template-columns: 1fr;
      gap: 18px;
    }
  }

  /* ===== Scene / media block ===== */
  .scene-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: center;
  }

  .scene-media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
  }

  .scene-media img {
    width: 100%;
    object-fit: cover;
    min-height: 300px;
  }

  .scene-media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(200deg, rgba(11,17,32,0.1), rgba(11,17,32,0.45));
    pointer-events: none;
  }

  .scene-content h3 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 14px;
    line-height: 1.4;
  }

  .scene-content p {
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 16px;
    font-size: 15px;
  }

  .scene-points {
    list-style: none;
    padding: 0;
    margin: 18px 0 0;
    display: grid;
    gap: 12px;
  }

  .scene-points li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--text);
  }

  .scene-points .dot-icon {
    width: 24px;
    height: 24px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(45,212,191,0.12);
    color: var(--primary);
    flex-shrink: 0;
  }

  @media (max-width: 900px) {
    .scene-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
  }

  /* ===== Info strip ===== */
  .info-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(34,211,238,0.2);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    backdrop-filter: blur(16px);
  }

  .info-strip-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px;
    border-radius: 12px;
    transition: background 0.3s ease;
  }

  .info-strip-item:hover {
    background: rgba(255,255,255,0.04);
  }

  .info-strip-item .icon-box {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(45,212,191,0.12);
    border: 1px solid rgba(45,212,191,0.25);
    color: var(--primary);
    flex-shrink: 0;
  }

  .info-strip-item .text {
    font-size: 14px;
    color: var(--text-dim);
    font-weight: 500;
    line-height: 1.4;
  }

  .info-strip-item .text strong {
    display: block;
    font-size: 16px;
    color: var(--text);
    font-weight: 700;
  }

  @media (max-width: 900px) {
    .info-strip {
      grid-template-columns: repeat(2, 1fr);
      padding: 28px 20px;
    }
  }

  @media (max-width: 520px) {
    .info-strip {
      grid-template-columns: 1fr;
      gap: 12px;
    }
  }

  /* ===== Side card ===== */
  .side-card {
    padding: 32px 28px;
  }

  .side-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .side-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 12px;
  }

  .side-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    font-size: 14px;
    color: var(--text);
    transition: all 0.25s ease;
  }

  .side-list li:hover {
    border-color: rgba(34,211,238,0.35);
    background: rgba(34,211,238,0.06);
  }

  .side-list .num {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(45,212,191,0.12);
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    flex-shrink: 0;
  }

  .stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 22px;
  }

  .stat-card {
    padding: 18px 16px;
    border-radius: 16px;
    background: rgba(255,255,255,0.035);
    border: 1px solid rgba(255,255,255,0.08);
    text-align: center;
  }

  .stat-card .value {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
  }

  .stat-card .label {
    font-size: 13px;
    color: var(--text-dim);
    margin-top: 4px;
  }

  .side-img {
    border-radius: 16px;
    overflow: hidden;
    margin-top: 20px;
    border: 1px solid var(--border);
  }

  .side-img img {
    min-height: 160px;
    object-fit: cover;
    width: 100%;
  }

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

  .faq-item {
    border-radius: 18px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    overflow: hidden;
    transition: border-color 0.3s ease;
  }

  .faq-item.active {
    border-color: rgba(45,212,191,0.3);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: color 0.2s;
  }

  .faq-question:hover {
    color: var(--primary);
  }

  .faq-icon {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(45,212,191,0.12);
    color: var(--primary);
    font-size: 22px;
    font-weight: 400;
    line-height: 1;
    transition: transform 0.35s ease;
    margin-left: 14px;
  }

  .faq-item.active .faq-icon {
    transform: rotate(45deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .faq-answer-inner {
    padding: 0 24px 22px;
    color: var(--text-dim);
    font-size: 15px;
    line-height: 1.75;
  }

  /* ===== CTA ===== */
  .cta-panel {
    position: relative;
    padding: 60px 48px;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(45,212,191,0.12), rgba(34,211,238,0.06));
    border: 1px solid rgba(45,212,191,0.25);
    backdrop-filter: blur(20px);
    text-align: center;
    overflow: hidden;
  }

  .cta-panel::before {
    content: '';
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 300px;
    background: radial-gradient(circle, rgba(34,211,238,0.18), transparent 70%);
    pointer-events: none;
  }

  .cta-panel h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 14px;
    position: relative;
  }

  .cta-panel p {
    color: var(--text-dim);
    font-size: 16px;
    margin-bottom: 30px;
    position: relative;
  }

  @media (max-width: 768px) {
    .cta-panel {
      padding: 42px 24px;
    }
    .cta-panel h2 {
      font-size: 24px;
    }
  }

  /* ===== Footer ===== */
  .site-footer {
    background: rgba(11,17,32,0.9);
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 60px 0 0;
    margin-top: 60px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 44px;
    padding-bottom: 44px;
  }

  .footer-brand .logo {
    margin-bottom: 14px;
  }

  .footer-brand p {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.8;
    max-width: 320px;
  }

  .site-footer h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
  }

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

  .footer-links a {
    color: var(--text-dim);
    font-size: 14px;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

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

  .footer-copy {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding: 22px 0;
    border-top: 1px solid rgba(255,255,255,0.05);
    color: var(--text-dim);
    font-size: 13px;
  }

  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
    .footer-copy {
      flex-direction: column;
      text-align: center;
    }
  }

  /* ===== back to top ===== */
  .back-top {
    position: fixed;
    right: 28px;
    bottom: 28px;
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: rgba(11,17,32,0.8);
    border: 1px solid rgba(45,212,191,0.3);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(14px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all 0.3s ease;
    z-index: 90;
  }

  .back-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .back-top:hover {
    background: rgba(45,212,191,0.15);
    color: var(--primary);
  }