/* roulang page: index */
:root{
  --bg:#060a14;
  --bg-soft:#0a1122;
  --panel:rgba(255,255,255,.055);
  --panel-strong:rgba(255,255,255,.085);
  --stroke:rgba(255,255,255,.13);
  --stroke-bright:rgba(255,255,255,.22);
  --txt:#e7edf9;
  --muted:#9aa7c0;
  --weak:#7d8aa5;
  --blue:#1b6cff;
  --cyan:#55e6f6;
  --teal:#2de2e6;
  --line:#101a30;
  --radius:18px;
  --radius-lg:22px;
  --shadow:0 20px 44px rgba(0,0,0,.34);
  --font:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  min-height:100vh;
  background:var(--bg);
  color:var(--txt);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(620px 420px at 85% -5%,rgba(27,108,255,.22),transparent 60%),
    radial-gradient(560px 340px at 100% 45%,rgba(45,226,230,.07),transparent 60%),
    radial-gradient(720px 480px at 0% 95%,rgba(124,94,255,.09),transparent 55%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.45;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:44px 44px;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;border:0}
button,input{font:inherit;border:0;background:none;color:inherit}
ul,ol{list-style:none}
:where(a,button,input,summary):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:8px;
}
::selection{background:rgba(85,230,246,.22);color:#fff}

.skip-link{
  position:absolute;
  left:-999px;
  top:12px;
  z-index:1000;
  background:#fff;
  color:#000;
  padding:8px 18px;
  border-radius:10px;
}
.skip-link:focus{left:12px;top:12px}

.wrap{
  width:min(1240px,100%);
  margin:0 auto;
  padding-inline:clamp(20px,4vw,56px);
}
.section{padding:92px 0;position:relative;z-index:1}
.section.compact{padding:64px 0}

.app-shell{position:relative;z-index:1;min-height:100vh}
.main-content{
  margin-left:268px;
  min-height:100vh;
  position:relative;
  display:flex;
  flex-direction:column;
}
.main-content main{flex:1}

/* ---------- Mobile top bar ---------- */
.mobile-top{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:62px;
  z-index:60;
  align-items:center;
  gap:12px;
  padding:0 14px;
  background:rgba(6,10,20,.78);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--stroke);
}
.mobile-brand{
  font-weight:800;
  font-size:17px;
  letter-spacing:.2px;
  color:#fff;
  margin-right:auto;
}
.mobile-top .icon-btn{
  width:42px;height:42px;
  border:1px solid var(--stroke);
  border-radius:12px;
  background:rgba(255,255,255,.05);
  color:var(--cyan);
  font-size:18px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:.25s;
}
.mobile-top .icon-btn:hover{background:rgba(255,255,255,.1)}
.top-live{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:12px;
  color:var(--muted);
  border:1px solid rgba(45,226,230,.22);
  background:rgba(45,226,230,.08);
  padding:5px 10px;
  border-radius:999px;
}
.top-live i{width:6px;height:6px;background:#47f5cf;border-radius:50%}

/* ---------- Sidebar ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:268px;
  z-index:80;
  padding:26px 18px 22px;
  display:flex;
  flex-direction:column;
  background:rgba(8,13,26,.82);
  backdrop-filter:blur(22px);
  -webkit-backdrop-filter:blur(22px);
  border-right:1px solid var(--stroke);
  transition:transform .35s cubic-bezier(.2,.8,.2,1);
  overflow-y:auto;
}
.sidebar-top{
  display:flex;
  align-items:center;
  gap:12px;
  padding-bottom:24px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.brand-mark{
  width:46px;height:46px;
  border-radius:14px;
  flex:0 0 46px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg,#1b4cff,#2de2e6);
  color:#fff;
  font-weight:900;
  font-size:16px;
  letter-spacing:-.5px;
  box-shadow:0 0 24px rgba(45,226,230,.35);
}
.brand-name{min-width:0}
.brand-name strong{
  display:block;
  color:#fff;
  font-size:17px;
  font-weight:800;
  letter-spacing:.2px;
  white-space:nowrap;
}
.brand-name span{
  display:flex;
  align-items:center;
  gap:7px;
  margin-top:2px;
  color:var(--muted);
  font-size:12px;
}
.brand-live{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.brand-live i{
  width:6px;height:6px;
  border-radius:50%;
  background:#38e6ba;
  box-shadow:0 0 10px #38e6ba;
}
.drawer-close{
  display:none;
  margin-left:auto;
  width:40px;height:40px;
  border-radius:12px;
  background:rgba(255,255,255,.06);
  color:var(--muted);
  font-size:18px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
.side-nav{margin-top:26px;flex:1}
.nav-label{
  color:var(--weak);
  font-size:12px;
  letter-spacing:.12em;
  padding:8px 12px 6px;
}
.nav-link{
  display:flex;
  align-items:center;
  gap:14px;
  height:48px;
  margin:4px 0;
  padding:0 12px;
  color:var(--muted);
  font-weight:500;
  border-radius:13px;
  transition:all .25s;
}
.nav-link i{width:20px;text-align:center;font-size:17px;color:#8fa0c2}
.nav-link .nav-text{white-space:nowrap}
.nav-link:hover{
  background:rgba(255,255,255,.06);
  color:#fff;
  transform:translateX(2px);
}
.nav-link:hover i{color:var(--cyan)}
.nav-link.active{
  background:linear-gradient(90deg,rgba(27,108,255,.25),rgba(45,226,230,.05));
  color:#fff;
  border:1px solid rgba(85,230,246,.2);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.02);
}
.nav-link.active::before{
  content:"";
  width:4px;height:22px;
  border-radius:999px;
  background:var(--cyan);
  box-shadow:0 0 14px var(--cyan);
  margin-left:-16px;
}
.nav-link.active i{color:var(--cyan)}
.side-search{
  margin-top:20px;
  padding:14px 0;
  border-top:1px solid rgba(255,255,255,.07);
}
.search-box{
  display:flex;
  align-items:center;
  gap:10px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--stroke);
  border-radius:13px;
  padding:0 14px;
  height:46px;
  transition:.25s;
}
.search-box i{color:var(--weak);font-size:15px}
.search-box input{
  flex:1;min-width:0;
  background:transparent;
  color:#fff;
  font-size:14px;
  outline:none;
}
.search-box input::placeholder{color:#6d7a95}
.search-box:focus-within{
  border-color:rgba(85,230,246,.5);
  box-shadow:0 0 0 4px rgba(45,226,230,.08);
}
.sidebar-foot{
  padding-top:16px;
  color:var(--weak);
  font-size:12px;
  border-top:1px solid rgba(255,255,255,.07);
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.sidebar-foot a{color:var(--weak)}
.sidebar-foot a:hover{color:var(--cyan)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding:12px 24px;
  border-radius:12px;
  font-weight:600;
  font-size:15px;
  line-height:1;
  transition:all .25s;
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#1b6cff,#2dbdec);
  box-shadow:0 6px 28px rgba(27,108,255,.4);
  border:1px solid rgba(117,200,255,.25);
}
.btn-primary:hover{
  transform:translateY(-1px);
  box-shadow:0 10px 40px rgba(45,226,230,.45);
  background:linear-gradient(135deg,#247aff,#3de2f0);
}
.btn-primary:active{transform:translateY(1px) scale(.98)}
.btn-ghost{
  color:rgba(255,255,255,.85);
  background:rgba(255,255,255,.06);
  border:1px solid var(--stroke-bright);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.12);
  color:#fff;
  border-color:rgba(85,230,246,.6);
}
.btn-ghost:active{transform:scale(.98)}
.btn-sm{
  min-height:38px;
  padding:8px 16px;
  font-size:13px;
  border-radius:10px;
}

/* ---------- Section headings ---------- */
.section-head{
  max-width:820px;
  margin-bottom:48px;
}
.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--cyan);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  margin-bottom:14px;
  text-transform:uppercase;
}
.kicker i{font-size:13px}
.section-head h2{
  color:#fff;
  font-size:clamp(28px,3vw,38px);
  font-weight:800;
  line-height:1.3;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.section-head p{
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
}
.section-head .kicker-line{
  width:34px;height:2px;
  background:linear-gradient(90deg,var(--cyan),transparent);
  display:inline-block;
  margin-right:4px;
  vertical-align:middle;
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:76vh;
  display:flex;
  align-items:center;
  overflow:hidden;
  isolation:isolate;
  padding:88px 0 72px;
  border-bottom:1px solid rgba(255,255,255,.04);
}
.hero-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  z-index:-2;
}
.hero-mask{
  position:absolute;
  inset:0;
  z-index:-1;
  background:
    linear-gradient(90deg,rgba(5,9,22,.94) 8%,rgba(7,12,25,.72) 46%,rgba(7,12,25,.28) 80%),
    linear-gradient(0deg,rgba(6,10,20,.88) 0%,transparent 46%);
}
.hero-topline{
  display:flex;
  align-items:center;
  gap:16px;
  margin-bottom:32px;
  color:rgba(255,255,255,.75);
  font-size:13px;
  letter-spacing:.05em;
}
.hero-topline .live-dot{
  width:8px;height:8px;
  border-radius:50%;
  background:#2ee6af;
  box-shadow:0 0 0 0 rgba(46,230,175,.45);
  animation:pulse 2s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(46,230,175,.5)}
  70%{box-shadow:0 0 0 10px rgba(46,230,175,0)}
  100%{box-shadow:0 0 0 0 rgba(46,230,175,0)}
}
.hero h1{
  color:#fff;
  font-size:clamp(40px,6vw,66px);
  line-height:1.15;
  font-weight:900;
  letter-spacing:-.03em;
  max-width:820px;
  text-shadow:0 10px 40px rgba(4,8,18,.6);
}
.hero h1 .line-blue{
  background:linear-gradient(115deg,#fff 30%,#a9c8ff 70%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  color:#d2daf0;
  font-size:clamp(16px,1.4vw,20px);
  margin:28px 0 34px;
  max-width:620px;
  line-height:1.9;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:26px;
  margin-top:48px;
  padding-top:26px;
  border-top:1px solid rgba(255,255,255,.1);
  max-width:620px;
}
.hero-meta span{
  display:inline-flex;
  align-items:center;
  gap:9px;
  color:rgba(255,255,255,.62);
  font-size:13px;
}
.hero-meta i{color:var(--cyan);font-size:15px}
.hero-bottom-note{
  position:absolute;
  left:clamp(20px,5vw,56px);
  bottom:18px;
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:rgba(255,255,255,.45);
  font-size:12px;
  letter-spacing:.05em;
}

/* ---------- Live status strip ---------- */
.live-strip{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px 32px;
  padding:20px 30px;
  margin-top:-30px;
  max-width:calc(1240px - 40px);
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.13);
  border-radius:18px;
  box-shadow:var(--shadow);
  position:relative;
  z-index:2;
}
.live-strip .status-item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:#dfe7f7;
  font-size:13px;
}
.live-strip .status-item strong{color:#fff}
.live-strip .status-item i{color:var(--cyan);font-size:14px}
.live-strip .divider-dot{
  width:4px;height:4px;
  border-radius:50%;
  background:rgba(255,255,255,.25);
}

/* ---------- Glass cards ---------- */
.glass{
  background:var(--panel);
  border:1px solid var(--stroke);
  border-radius:var(--radius);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:all .3s ease;
}

/* ---------- Channel grid ---------- */
.channel-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.channel-card{
  position:relative;
  overflow:hidden;
  background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius-lg);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:transform .35s,box-shadow .35s,border-color .35s;
  display:flex;
  flex-direction:column;
  min-height:430px;
}
.channel-card:hover{
  transform:translateY(-5px);
  border-color:rgba(85,230,246,.4);
  box-shadow:0 22px 60px rgba(0,0,0,.42),0 0 0 1px rgba(85,230,246,.1);
}
.channel-cover{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
}
.channel-cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 45%,rgba(6,10,20,.9));
}
.channel-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.channel-card:hover .channel-cover img{transform:scale(1.045)}
.channel-cover .type-flag{
  position:absolute;
  top:16px;left:16px;
  z-index:2;
  padding:5px 13px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  background:rgba(6,12,26,.62);
  backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.18);
  color:#fff;
}
.channel-body{
  padding:26px 24px 24px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.channel-body h3{
  color:#fff;
  font-size:22px;
  font-weight:800;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.channel-body h3 em{
  font-style:normal;
  color:var(--cyan);
}
.channel-body p{
  color:var(--muted);
  font-size:14px;
  line-height:1.85;
  margin-bottom:22px;
  flex:1;
}
.card-more{
  display:inline-flex;
  align-items:center;
  gap:9px;
  color:#fff;
  font-size:14px;
  font-weight:600;
  transition:color .25s;
  margin-top:auto;
}
.card-more i{transition:transform .25s;color:var(--cyan)}
.channel-card:hover .card-more{color:var(--cyan)}
.channel-card:hover .card-more i{transform:translateX(5px)}

/* ---------- Showcase / special grid ---------- */
.showcase-grid{
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:26px;
}
.showcase-card{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid var(--stroke);
  background:rgba(255,255,255,.045);
}
.showcase-main{
  min-height:500px;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  padding:30px;
  position:relative;
}
.showcase-main .showcase-bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.showcase-main .showcase-shade{
  position:absolute;
  inset:0;
  background:linear-gradient(185deg,rgba(5,9,20,.18) 20%,rgba(5,9,20,.92) 90%);
}
.showcase-content{
  position:relative;
  z-index:2;
}
.chip-row{
  display:flex;
  flex-wrap:wrap;
  gap:9px;
  margin-bottom:18px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:12px;
  color:#dfeaff;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.16);
  padding:5px 11px;
  border-radius:999px;
  backdrop-filter:blur(6px);
}
.chip i{color:var(--cyan)}
.showcase-main h3{
  color:#fff;
  font-size:clamp(22px,2.6vw,30px);
  font-weight:800;
  line-height:1.35;
  max-width:540px;
  margin-bottom:15px;
}
.showcase-main p{
  color:#d3dbee;
  font-size:15px;
  line-height:1.9;
  max-width:560px;
  margin-bottom:24px;
}
.showcase-stack{
  display:grid;
  grid-template-rows:1fr 1fr;
  gap:26px;
}
.showcase-sub{
  padding:26px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  transition:border-color .3s;
}
.showcase-sub:hover{
  border-color:rgba(85,230,246,.38);
  background:rgba(255,255,255,.07);
}
.showcase-sub .sub-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--cyan);
  font-weight:600;
  letter-spacing:.06em;
  margin-bottom:12px;
}
.showcase-sub h3{
  color:#fff;
  font-size:20px;
  font-weight:800;
  margin-bottom:12px;
}
.showcase-sub p{
  color:var(--muted);
  font-size:14px;
  line-height:1.8;
  margin-bottom:8px;
}
.showcase-sub .card-more{
  color:#cfdbed;
  font-size:13px;
}
.showcase-sub:hover .card-more{color:var(--cyan)}

/* ---------- Service orbit / data row ---------- */
.orbit-band{
  background:rgba(8,14,30,.55);
  border:1px solid var(--stroke);
  border-radius:var(--radius-lg);
  padding:40px;
  display:grid;
  grid-template-columns:.95fr 1.85fr;
  gap:42px;
}
.orbit-band h2{
  color:#fff;
  font-size:clamp(22px,2vw,28px);
  font-weight:800;
  line-height:1.4;
  margin:0 0 12px;
}
.orbit-band .lead{
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
}
.timeline-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.timeline-item{
  padding:18px 20px;
  border-radius:16px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  display:flex;
  gap:14px;
  transition:.25s;
}
.timeline-item:hover{
  background:rgba(255,255,255,.08);
  border-color:rgba(85,230,246,.4);
  transform:translateY(-2px);
}
.timeline-num{
  flex:0 0 32px;
  height:32px;
  border-radius:10px;
  background:linear-gradient(135deg,rgba(27,108,255,.45),rgba(45,226,230,.35));
  border:1px solid rgba(85,230,246,.25);
  color:#fff;
  font-size:13px;
  font-weight:800;
  display:flex;
  align-items:center;
  justify-content:center;
}
.timeline-item h4{
  color:#dfe7f6;
  font-size:15px;
  font-weight:700;
  margin-bottom:5px;
}
.timeline-item p{
  color:var(--weak);
  font-size:13px;
  line-height:1.7;
  font-weight:400;
}

/* ---------- Metric row ---------- */
.metric-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.metric-card{
  padding:26px;
  border-radius:var(--radius);
  background:rgba(255,255,255,.05);
  border:1px solid var(--stroke);
  text-align:center;
  backdrop-filter:blur(10px);
}
.metric-card strong{
  display:block;
  color:#fff;
  font-size:clamp(28px,3vw,36px);
  font-weight:900;
  line-height:1.2;
  background:linear-gradient(115deg,#fff 20%,#70dcf5);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.metric-card span{
  display:inline-block;
  margin-top:8px;
  color:var(--muted);
  font-size:14px;
  letter-spacing:.04em;
}
.metric-card small{
  display:block;
  color:var(--weak);
  font-size:12px;
  margin-top:6px;
}

/* ---------- CMS list ---------- */
.cms-section{
  background:linear-gradient(180deg,rgba(7,12,24,.4),rgba(5,9,18,.8));
  border-top:1px solid var(--stroke);
  border-bottom:1px solid var(--stroke);
}
.cms-panel{
  background:rgba(255,255,255,.045);
  border:1px solid var(--stroke);
  border-radius:var(--radius-lg);
  padding:26px 28px;
  backdrop-filter:blur(18px);
}
.cms-list-head{
  display:flex;
  align-items:center;
  gap:14px;
  padding-bottom:16px;
  margin-bottom:10px;
  border-bottom:1px solid rgba(255,255,255,.09);
}
.cms-list-head .live-tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  background:rgba(46,230,175,.1);
  color:#63f1c4;
  border:1px solid rgba(46,230,175,.3);
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
}
.cms-list-head h3{
  color:#fff;
  font-size:18px;
  font-weight:700;
}
.cms-list{margin-top:6px}
.cms-row{
  position:relative;
  display:grid;
  grid-template-columns:max-content minmax(0,1fr) auto 32px;
  gap:22px;
  align-items:center;
  padding:21px 12px;
  border-bottom:1px solid rgba(255,255,255,.07);
  transition:background .25s,border-color .25s;
  border-radius:14px;
}
.cms-row:last-child{border-bottom:0}
.cms-row:hover{
  background:rgba(255,255,255,.06);
  border-bottom-color:transparent;
}
.cms-cat{
  color:#fff;
  font-size:12px;
  font-weight:600;
  padding:6px 13px;
  border-radius:999px;
  background:rgba(27,108,255,.2);
  border:1px solid rgba(27,108,255,.35);
  white-space:nowrap;
  align-self:flex-start;
  margin-top:2px;
}
.cms-link{min-width:0}
.cms-link h4{
  font-size:16px;
  font-weight:600;
  color:#f0f4ff;
  line-height:1.55;
  margin-bottom:5px;
  transition:color .2s;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.cms-row:hover .cms-link h4{color:var(--cyan)}
.cms-excerpt{
  color:var(--weak);
  font-size:13px;
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:0;
}
.cms-date{
  color:var(--weak);
  font-size:13px;
  white-space:nowrap;
  font-variant-numeric:tabular-nums;
  display:flex;
  align-items:center;
  gap:8px;
}
.cms-date i{color:#5a6a8a;font-size:12px}
.cms-arrow{
  width:32px;height:32px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.13);
  background:rgba(255,255,255,.04);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  font-size:14px;
  opacity:0;
  transform:translateX(-6px);
  transition:.28s;
}
.cms-row:hover .cms-arrow{
  opacity:1;
  transform:none;
  color:var(--cyan);
  border-color:rgba(85,230,246,.35);
}
.cms-empty{
  text-align:center;
  padding:54px 20px;
  color:var(--muted);
}
.cms-empty i{
  font-size:32px;
  color:rgba(255,255,255,.15);
  margin-bottom:16px;
  display:block;
}
.cms-empty p{
  font-size:15px;
  color:var(--weak);
  letter-spacing:.03em;
}

/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
}
.faq-item{
  background:rgba(255,255,255,.05);
  border:1px solid var(--stroke);
  border-radius:16px;
  transition:border-color .3s;
  overflow:hidden;
}
.faq-item:hover{
  border-color:rgba(85,230,246,.32);
  background:rgba(255,255,255,.07);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:20px 24px;
  cursor:pointer;
  font-weight:600;
  color:#eef3ff;
  font-size:15px;
  line-height:1.6;
  list-style:none;
  transition:.25s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--cyan)}
.faq-item summary i{
  flex:0 0 18px;
  color:var(--muted);
  font-size:15px;
  transition:transform .35s,color .35s;
  text-align:center;
}
.faq-item[open] summary i{
  transform:rotate(45deg);
  color:var(--cyan);
}
.faq-answer{
  padding:0 24px 22px;
  color:var(--muted);
  font-size:14px;
  line-height:1.9;
}
.faq-answer p + p{margin-top:12px}

/* ---------- CTA ---------- */
.cta-wrap{
  border-radius:24px;
  padding:4px;
  background:linear-gradient(110deg,rgba(27,108,255,.55),rgba(45,226,230,.55),rgba(27,108,255,.45));
}
.cta-panel{
  position:relative;
  overflow:hidden;
  text-align:center;
  padding:76px 40px;
  border-radius:21px;
  background:rgba(8,13,27,.9);
  backdrop-filter:blur(16px);
}
.cta-panel::before{
  content:"";
  position:absolute;
  width:420px;height:220px;
  right:-180px;top:-120px;
  border-radius:50%;
  background:rgba(45,226,230,.14);
  filter:blur(40px);
  pointer-events:none;
}
.cta-panel .bit-icon{
  width:70px;height:70px;
  margin:0 auto 26px;
  border-radius:20px;
  background:linear-gradient(135deg,#1b6cff,#2de2e6);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:26px;
  color:#fff;
  box-shadow:0 0 46px rgba(45,226,230,.35);
}
.cta-panel h2{
  color:#fff;
  font-size:clamp(24px,3vw,36px);
  font-weight:800;
  line-height:1.35;
  margin-bottom:16px;
}
.cta-panel p{
  color:var(--muted);
  font-size:15px;
  max-width:560px;
  margin:0 auto 32px;
  line-height:1.9;
}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px}
.fav-tip{
  margin-top:18px;
  color:#6fdff0;
  font-size:13px;
  min-height:22px;
  transition:opacity .3s;
}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid rgba(255,255,255,.08);
  background:rgba(4,8,16,.5);
  backdrop-filter:blur(10px);
  padding:56px 0 34px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .8fr .9fr;
  gap:44px;
  padding-bottom:38px;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.footer-brand .brand-mark{margin-bottom:16px}
.footer-brand p{
  color:var(--weak);
  font-size:13px;
  margin-top:14px;
  line-height:1.9;
  max-width:340px;
}
.footer-brand .footer-brand-name{
  color:#fff;
  font-size:20px;
  font-weight:800;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:20px;
  letter-spacing:.02em;
}
.footer-col a{
  display:block;
  color:var(--muted);
  font-size:14px;
  padding:7px 0;
  transition:.2s;
}
.footer-col a:hover{
  color:var(--cyan);
  padding-left:5px;
}
.footer-col .footer-sub{
  color:var(--weak);
  font-size:13px;
  padding-top:12px;
}
.footer-copyright{
  padding-top:28px;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:14px;
  color:var(--weak);
  font-size:13px;
}
.footer-copyright a{color:var(--weak)}
.footer-copyright a:hover{color:var(--cyan)}
.footer-legal{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
}
.sep-dot{opacity:.4}

/* ---------- Media queries ---------- */
@media (max-width:1199px){
  .sidebar{width:84px;padding:18px 10px}
  .brand-name,.brand-live,.side-nav .nav-text,.nav-label,.search-box input,.sidebar-foot{display:none}
  .sidebar-top{justify-content:center;padding-bottom:16px}
  .brand-mark{margin:0 auto}
  .side-nav{margin-top:18px}
  .nav-link{
    justify-content:center;
    padding:0;
    gap:0;
    margin:4px 0;
  }
  .nav-link.active::before{margin-left:0;margin-right:0;position:absolute}
  .nav-link i{margin:0}
  .main-content{margin-left:84px}
  .search-box{justify-content:center;padding:0}
  .search-box i{margin:auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:767px){
  .mobile-top{display:flex}
  .sidebar{
    width:300px;
    transform:translateX(-100%);
    padding:22px;
  }
  .sidebar.open{transform:translateX(0)}
  .drawer-close{display:inline-flex}
  .brand-name,.brand-live,.side-nav .nav-text,.nav-label,.search-box input,.sidebar-foot{display:block}
  .brand-mark{margin:0}
  .sidebar-top{justify-content:flex-start}
  .nav-link{padding:0 12px}
  .nav-link.active::before{margin-left:-12px}
  .side-nav{margin-top:10px}
  .search-box{justify-content:flex-start;padding:0 14px}
  .search-box i{color:var(--weak)}
  .main-content{margin-left:0;padding-top:62px}
  .drawer-mask{
    position:fixed;inset:0;z-index:70;background:rgba(3,6,14,.72);backdrop-filter:blur(3px);
    opacity:0;pointer-events:none;transition:.3s;
  }
  .drawer-mask.show{opacity:1;pointer-events:auto}
  .section{padding:64px 0}
  .hero{min-height:auto;padding:80px 0 70px}
  .hero h1{font-size:clamp(31px,8.4vw,46px)}
  .hero-img{opacity:.48}
  .hero-mask{background:linear-gradient(180deg,rgba(5,9,20,.65) 0%,rgba(6,10,20,.94) 88%)}
  .hero-meta{gap:14px}
  .hero-bottom-note{display:none}
  .metric-row,.channel-grid,.showcase-grid,.orbit-band,.faq-grid,.timeline-list{grid-template-columns:1fr}
  .section-head{margin-bottom:34px}
  .channel-card{min-height:0}
  .orbit-band{padding:30px 24px;gap:30px}
  .showcase-main{min-height:360px;padding:24px}
  .cms-panel{padding:18px}
  .cms-cat{margin-bottom:8px}
  .cms-row{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:18px 10px}
  .cms-arrow{display:none}
  .cms-date{align-self:flex-start;font-size:12px}
  .cta-panel{padding:56px 24px}
  .footer-grid{grid-template-columns:1fr}
  .footer-copyright{display:block}
  .footer-legal{margin-bottom:16px}
  .footer-col a{padding:5px 0}
}
@media (min-width:768px) and (max-width:1024px){
  .hero{margin-top:0}
  .live-strip{margin-top:-20px}
  .showcase-grid{grid-template-columns:1fr}
  .showcase-stack{grid-template-columns:1fr 1fr;grid-template-rows:1fr}
  .orbit-band{grid-template-columns:1fr}
  .timeline-list{grid-template-columns:1fr 1fr}
}
@media (max-width:480px){
  .wrap{padding-inline:16px}
  .channel-grid{gap:18px}
  .section{padding:52px 0}
  .hero-actions .btn{width:100%}
  .metric-card{padding:20px}
  .cta-panel{padding:44px 16px}
  .timeline-list{grid-template-columns:1fr}
  .live-strip{padding:16px 18px}
  .showcase-main{min-height:300px;padding:20px}
  .showcase-sub{padding:20px}
  .footer-brand .brand-mark{margin:0 0 16px}
}

/* roulang page: category1 */
:root {
            --bg: #070B17;
            --surface: rgba(255, 255, 255, 0.05);
            --surface-strong: rgba(255, 255, 255, 0.09);
            --border: rgba(255, 255, 255, 0.14);
            --border-hover: rgba(85, 230, 255, 0.5);
            --primary: #1B6CFF;
            --cyan: #55E6FF;
            --violet: #7B6CFF;
            --text: #E5EAF5;
            --muted: #8B95AD;
            --radius-md: 10px;
            --radius-card: 14px;
            --radius-large: 20px;
            --max-w: 1220px;
            --shadow-deep: 0 24px 50px rgba(0, 0, 0, 0.35);
            --shadow-cyan: 0 0 0 1px rgba(85, 230, 255, 0.06), 0 14px 40px rgba(85, 230, 255, 0.10);
            --glow-blue: 0 8px 30px rgba(27, 108, 255, 0.42);
            --grid: rgba(255, 255, 255, 0.03);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background:
                radial-gradient(900px 420px at 85% -5%, rgba(27, 108, 255, 0.15), transparent 65%),
                radial-gradient(800px 360px at 10% 100%, rgba(123, 108, 255, 0.1), transparent 60%),
                var(--bg);
            color: var(--text);
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            line-height: 1.78;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            background-attachment: fixed;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            opacity: .9;
            background-image:
                linear-gradient(var(--grid) 1px, transparent 1px),
                linear-gradient(90deg, var(--grid) 1px, transparent 1px);
            background-size: 58px 58px;
        }
        img,
        svg,
        video {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: all .25s ease;
        }
        button,
        input {
            font-family: inherit;
        }
        .app-shell {
            position: relative;
            z-index: 1;
            display: flex;
            min-height: 100vh;
        }
        .site-main {
            flex: 1 1 100%;
            margin-left: 258px;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* Desktop side nav */
        .side-nav-wrap {
            width: 258px;
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            z-index: 60;
            background: rgba(7, 11, 23, 0.72);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-right: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            flex-direction: column;
            padding: 26px 18px;
            width: 258px;
        }
        .brand-block {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 8px 26px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 24px;
        }
        .brand-mark {
            width: 42px;
            height: 42px;
            border-radius: 13px;
            display: grid;
            place-items: center;
            font-size: 18px;
            font-weight: 800;
            color: #061121;
            background: linear-gradient(135deg, #55E6FF 0%, #1B6CFF 55%, #7B6CFF 120%);
            box-shadow: 0 0 24px rgba(85, 230, 255, 0.35);
            letter-spacing: .5px;
            flex: none;
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            min-width: 0;
        }
        .brand-name {
            font-size: 16px;
            font-weight: 800;
            white-space: nowrap;
            letter-spacing: .2px;
            color: #F0F4FF;
        }
        .brand-online {
            font-size: 12px;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-top: 2px;
        }
        .brand-online i {
            width: 7px;
            height: 7px;
            background: #2DE2E6;
            border-radius: 50%;
            box-shadow: 0 0 10px #2DE2E6;
            display: inline-block;
        }
        .nav-label {
            font-size: 12px;
            font-weight: 600;
            letter-spacing: .12em;
            text-transform: uppercase;
            color: #5A6580;
            padding: 8px 12px;
            margin: 8px 0 6px;
        }
        .side-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 46px;
            padding: 0 14px;
            border-radius: 12px;
            color: #A8B2C9;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid transparent;
            transition: all .22s ease;
            position: relative;
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: #7D89A3;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            transform: translateX(2px);
        }
        .nav-link:hover i {
            color: var(--cyan);
        }
        .nav-link.active {
            background: rgba(27, 108, 255, 0.14);
            border-color: rgba(85, 230, 255, 0.18);
            color: #fff;
            font-weight: 600;
        }
        .nav-link.active::before {
            content: "";
            position: absolute;
            left: -1px;
            width: 3px;
            height: 20px;
            border-radius: 0 4px 4px 0;
            background: var(--cyan);
            box-shadow: 0 0 16px rgba(85, 230, 255, .9);
        }
        .nav-link.active i {
            color: var(--cyan);
        }
        .side-foot {
            margin-top: auto;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            font-size: 13px;
            color: var(--muted);
        }
        .side-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 11px;
            padding: 0 12px;
            height: 40px;
            gap: 8px;
            color: var(--muted);
            margin-bottom: 8px;
        }
        .side-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text);
            font-size: 13px;
            width: 100%;
        }
        .side-search input::placeholder {
            color: #6E7891;
        }

        /* Mobile header */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            left: 0;
            height: 64px;
            z-index: 70;
            background: rgba(7, 11, 23, .82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            align-items: center;
            justify-content: space-between;
            padding: 0 18px;
        }
        .mobile-header .brand-inline {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-header .brand-inline span {
            font-weight: 800;
            font-size: 15px;
        }
        .mobile-menu-btn {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 18px;
            display: grid;
            place-items: center;
            cursor: pointer;
            transition: all .2s;
        }
        .mobile-menu-btn:hover {
            border-color: rgba(85, 230, 255, .4);
            color: var(--cyan);
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .56);
            z-index: 79;
            opacity: 0;
            visibility: hidden;
            transition: all .3s;
        }
        .drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }

        /* Mobile drawer navigation */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 80;
            width: 280px;
            background: rgba(10, 16, 30, 0.96);
            backdrop-filter: blur(28px);
            border-right: 1px solid rgba(255, 255, 255, 0.08);
            transform: translateX(-102%);
            transition: transform .32s cubic-bezier(.22, 1, .36, 1);
            display: flex;
            flex-direction: column;
            padding: 22px 16px;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }

        /* content wrappers */
        .container-page {
            width: 100%;
            max-width: var(--max-w);
            margin-left: auto;
            margin-right: auto;
            padding-left: 36px;
            padding-right: 36px;
        }
        .section-space {
            padding: 72px 0;
        }
        .section-space-sm {
            padding: 52px 0;
        }

        /* hero */
        .page-hero {
            position: relative;
            min-height: 52vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            isolation: isolate;
            padding: 80px 0 64px;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: -2;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            filter: saturate(.85);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            z-index: -1;
            background:
                linear-gradient(90deg, rgba(7, 11, 23, 0.93) 0%, rgba(7, 11, 23, 0.66) 60%, rgba(7, 11, 23, 0.4) 100%),
                radial-gradient(600px 260px at 72% 20%, rgba(85, 230, 255, .12), transparent 70%);
        }
        .hero-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            color: var(--muted);
            font-size: 13px;
            margin-bottom: 18px;
        }
        .hero-breadcrumb a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s;
        }
        .hero-breadcrumb a:hover {
            color: var(--cyan);
        }
        .hero-breadcrumb i {
            font-size: 12px;
            color: #5A6580;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 13px;
            border-radius: 999px;
            background: rgba(85, 230, 255, .08);
            border: 1px solid rgba(85, 230, 255, .22);
            color: #AEEFFF;
            font-size: 13px;
            font-weight: 500;
            backdrop-filter: blur(8px);
            margin-bottom: 20px;
        }
        .hero-badge .pulse-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #2DE2E6;
            box-shadow: 0 0 12px #2DE2E6;
        }
        .page-hero h1 {
            font-size: clamp(44px, 7vw, 68px);
            line-height: 1.08;
            font-weight: 900;
            letter-spacing: -2px;
            color: #fff;
            max-width: 640px;
            margin-bottom: 18px;
        }
        .hero-lead {
            max-width: 660px;
            color: #C6D0E1;
            font-size: 17px;
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* buttons */
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background: linear-gradient(135deg, #1B6CFF 0%, #55E6FF 100%);
            color: #04121F;
            font-weight: 700;
            font-size: 15px;
            padding: 14px 24px;
            border-radius: 12px;
            border: none;
            cursor: pointer;
            box-shadow: 0 8px 30px rgba(27, 108, 255, 0.40);
            transition: transform .22s, box-shadow .22s, filter .22s;
            min-height: 48px;
        }
        .btn-primary-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(85, 230, 255, 0.45);
            filter: brightness(1.08);
        }
        .btn-primary-glow:active {
            transform: translateY(0);
        }
        .btn-primary-glow:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: rgba(255, 255, 255, .88);
            font-size: 15px;
            font-weight: 600;
            padding: 14px 22px;
            border-radius: 12px;
            min-height: 48px;
            backdrop-filter: blur(12px);
            transition: all .22s;
        }
        .btn-ghost:hover {
            border-color: rgba(85, 230, 255, .45);
            background: rgba(85, 230, 255, .08);
            color: #fff;
        }
        .btn-ghost:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }

        /* section head */
        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .08em;
            color: var(--cyan);
            margin-bottom: 12px;
        }
        .section-kicker::before {
            content: "";
            width: 18px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--cyan));
        }
        .section-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.25;
            color: #F0F4FF;
            max-width: 760px;
        }
        .section-desc {
            color: #A4AFC7;
            font-size: 15px;
            line-height: 1.82;
            max-width: 720px;
            margin-top: 16px;
        }

        /* Glass card */
        .glass-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-top-color: rgba(255, 255, 255, 0.2);
            border-radius: 18px;
            box-shadow: 0 18px 38px rgba(0, 0, 0, 0.28);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: all .25s ease;
        }
        .glass-card:hover {
            border-color: rgba(85, 230, 255, .22);
            transform: translateY(-3px);
        }

        /* topic-card channel */
        .channel-card {
            padding: 26px 22px;
            border-radius: 18px;
            position: relative;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .channel-icon {
            width: 44px;
            height: 44px;
            border-radius: 13px;
            display: grid;
            place-items: center;
            font-size: 19px;
            margin-bottom: 18px;
            background: linear-gradient(135deg, rgba(27, 108, 255, 0.22), rgba(85, 230, 255, 0.08));
            border: 1px solid rgba(85, 230, 255, 0.16);
            color: var(--cyan);
            flex: none;
        }
        .channel-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #F0F4FF;
            margin-bottom: 8px;
        }
        .channel-card p {
            font-size: 14px;
            color: #A4AFC7;
            line-height: 1.72;
        }
        .channel-index {
            position: absolute;
            top: 18px;
            right: 20px;
            font-size: 40px;
            font-weight: 900;
            opacity: .06;
            color: #fff;
            line-height: 1;
            letter-spacing: -3px;
        }

        /* value split */
        .value-card {
            background: rgba(255, 255, 255, 0.035);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 16px;
            padding: 18px 18px;
            display: flex;
            gap: 14px;
            align-items: flex-start;
            transition: all .22s;
        }
        .value-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(85, 230, 255, .2);
        }
        .value-card .value-num {
            font-size: 13px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1px rgba(85, 230, 255, .7);
            min-width: 28px;
        }
        .value-card .value-line h4 {
            font-size: 15px;
            font-weight: 700;
            color: #E8EDFA;
            margin-bottom: 4px;
        }
        .value-card .value-line p {
            font-size: 13.5px;
            color: #8893AC;
            line-height: 1.68;
        }
        .figure-stack {
            position: relative;
            border-radius: 22px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.14);
            box-shadow: var(--shadow-deep);
        }
        .figure-stack img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
        }
        .figure-caption {
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 18px;
            padding: 16px 18px;
            background: rgba(6, 12, 22, .68);
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: 14px;
            backdrop-filter: blur(16px);
            font-size: 13px;
            color: #C6D0E1;
        }

        /* timeline */
        .timeline-wrap {
            position: relative;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .timeline-node {
            position: relative;
            padding: 30px 24px;
            text-align: left;
            overflow: hidden;
        }
        .timeline-node::after {
            content: "";
            position: absolute;
            width: 12px;
            height: 12px;
            top: 30px;
            right: 24px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 18px var(--cyan);
            opacity: .9;
        }
        .timeline-icon {
            width: 40px;
            height: 40px;
            display: grid;
            place-items: center;
            border-radius: 12px;
            background: rgba(27, 108, 255, .16);
            border: 1px solid rgba(85, 230, 255, .18);
            color: var(--cyan);
            font-size: 17px;
            margin-bottom: 18px;
        }
        .timeline-node h3 {
            font-size: 17px;
            font-weight: 700;
            color: #EDF1FC;
            margin-bottom: 8px;
        }
        .timeline-node p {
            font-size: 14px;
            color: #9BA6BE;
            line-height: 1.72;
        }

        /* steps */
        .usage-step {
            display: flex;
            align-items: flex-start;
            gap: 22px;
            padding: 18px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            transition: all .2s;
        }
        .usage-step:last-child {
            border-bottom: none;
        }
        .step-number {
            width: 46px;
            height: 46px;
            flex: none;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(85, 230, 255, .18), rgba(27, 108, 255, .12));
            border: 1px solid rgba(85, 230, 255, .22);
            display: grid;
            place-items: center;
            color: #7BF0FF;
            font-size: 14px;
            font-weight: 800;
            box-shadow: 0 0 22px rgba(85, 230, 255, .10);
        }
        .usage-step .step-content h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
            color: #EAF0FD;
        }
        .usage-step .step-content p {
            font-size: 14.5px;
            color: #96A1B9;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-item {
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 16px;
            margin-bottom: 12px;
            transition: all .22s;
        }
        .faq-item[open] {
            border-color: rgba(85, 230, 255, .22);
            background: rgba(255, 255, 255, .06);
        }
        .faq-item summary {
            list-style: none;
            padding: 20px 20px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 15px;
            font-weight: 600;
            color: #E4EAF7;
            border-radius: 16px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--cyan);
            font-size: 15px;
            opacity: .8;
            transition: transform .3s;
            flex: none;
            margin-left: 20px;
        }
        .faq-item[open] summary i {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 20px 20px;
            color: #A4AFC7;
            font-size: 14.5px;
            line-height: 1.78;
        }

        /* CTA */
        .cta-box {
            position: relative;
            overflow: hidden;
            background:
                radial-gradient(700px 280px at 78% 0%, rgba(27, 108, 255, 0.22), transparent 60%),
                radial-gradient(500px 200px at 0% 110%, rgba(85, 230, 255, 0.12), transparent 60%),
                rgba(255, 255, 255, .05);
            border: 1px solid rgba(85, 230, 255, .2);
            border-radius: 24px;
            padding: 50px 42px;
            text-align: center;
        }
        .cta-box h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 800;
            color: #F0F6FF;
            margin-bottom: 14px;
        }
        .cta-box p {
            font-size: 15px;
            color: #B0BACF;
            max-width: 620px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }

        /* footer */
        .site-footer {
            margin-top: 0;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            background: rgba(4, 7, 15, .6);
            backdrop-filter: blur(18px);
            padding: 52px 0 26px;
            font-size: 14px;
        }
        .site-footer .wrap {
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 36px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.1fr;
            gap: 38px;
            margin-bottom: 34px;
        }
        .footer-brand-name {
            font-size: 17px;
            font-weight: 800;
            color: #EDF2FD;
            margin-bottom: 6px;
        }
        .footer-brand p,
        .footer-sub {
            color: #8A96AF;
            font-size: 13.5px;
            line-height: 1.7;
            margin-top: 8px;
        }
        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col h4 {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .06em;
            text-transform: uppercase;
            color: #B4BED4;
            margin-bottom: 8px;
        }
        .footer-col a {
            color: #8893AA;
            width: fit-content;
        }
        .footer-col a:hover {
            color: var(--cyan);
        }
        .footer-copyright {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 22px;
            border-top: 1px solid rgba(255, 255, 255, .06);
            color: #758098;
            font-size: 13px;
        }
        .footer-copyright a:hover {
            color: var(--cyan);
        }
        .footer-copyright .sep-dot {
            margin: 0 6px;
        }
        .footer-legal {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }

        /* responsive */
        @media (max-width: 1199px) {
            .site-main {
                margin-left: 88px;
            }
            .side-nav-wrap {
                width: 88px;
                align-items: center;
                padding: 24px 10px 16px;
            }
            .brand-block {
                justify-content: center;
                padding-left: 0;
                padding-right: 0;
            }
            .brand-text,
            .nav-label,
            .nav-text,
            .side-search input,
            .side-foot {
                display: none;
            }
            .side-nav {
                width: 100%;
                align-items: center;
            }
            .nav-link {
                justify-content: center;
                width: 52px;
                height: 52px;
                padding: 0;
                border-radius: 14px;
            }
            .nav-link i {
                font-size: 18px;
            }
            .nav-link.active::before {
                left: -10px;
            }
        }
        @media (max-width: 1024px) {
            .container-page {
                padding-left: 28px;
                padding-right: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 768px) {
            .site-main {
                margin-left: 0;
                padding-top: 64px;
            }
            .side-nav-wrap {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .container-page {
                padding-left: 20px;
                padding-right: 20px;
            }
            .site-footer .wrap {
                padding: 0 20px;
            }
            .page-hero {
                min-height: auto;
                padding: 70px 0 56px;
            }
            .page-hero h1 {
                font-size: 40px;
                letter-spacing: -1px;
            }
            .section-space {
                padding: 56px 0;
            }
            .timeline-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-copyright {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-legal {
                flex-direction: column;
                gap: 6px;
            }
            .cta-box {
                padding: 38px 20px;
            }
        }
        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary-glow,
            .hero-actions .btn-ghost {
                width: 100%;
            }
            .page-hero h1 {
                font-size: 34px;
            }
            .hero-lead {
                font-size: 15px;
            }
        }

/* roulang page: article */
:root {
  --bg-deep: #05070F;
  --bg-night: #070B17;
  --bg-soft: #0B1224;
  --panel: rgba(255,255,255,.055);
  --panel-strong: rgba(255,255,255,.085);
  --stroke: rgba(255,255,255,.115);
  --stroke-light: rgba(255,255,255,.18);
  --white-line: rgba(255,255,255,.36);
  --primary: #1B6CFF;
  --primary-soft: #4D95FF;
  --cyan: #2DE2E6;
  --purple: #6868F7;
  --text: #E7ECF7;
  --text-soft: #A7B1C6;
  --text-dim: #7C87A0;
  --r-xs: 10px;
  --r-sm: 14px;
  --r-md: 18px;
  --r-lg: 22px;
  --shadow: 0 24px 48px rgba(2,4,12,.34);
  --shadow-hover: 0 28px 60px rgba(0,0,0,.45), 0 0 0 1px rgba(45,226,230,.10), 0 0 32px rgba(45,226,230,.08);
  --font: "Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(900px 520px at 82% -10%, rgba(45,226,230,.10), transparent 60%),
    radial-gradient(820px 600px at 12% 110%, rgba(94,84,255,.12), transparent 60%),
    #05070F;
  color:var(--text);
  font-family:var(--font);
  font-size:15px;
  line-height:1.75;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:52px 52px;
  pointer-events:none;
  z-index:0;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea{font-family:var(--font)}
button{outline:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.wrap{max-width:1200px;margin:0 auto;padding-inline:28px}

/* ---------- 左侧导航 ---------- */
.site-sidebar{
  position:fixed;
  inset:0 auto 0 0;
  width:268px;
  background:rgba(5,8,16,.82);
  border-right:1px solid rgba(255,255,255,.10);
  backdrop-filter:blur(22px);
  -webkit-backdrop-filter:blur(22px);
  z-index:60;
  display:flex;
  flex-direction:column;
  padding:34px 20px 22px;
}
.side-brand-link{
  display:flex;
  align-items:center;
  gap:12px;
  padding:4px 6px 24px;
}
.brand-mark{
  flex:0 0 auto;
  width:44px;
  height:44px;
  border-radius:14px;
  display:grid;
  place-items:center;
  font-size:16px;
  font-weight:900;
  color:#061225;
  background:linear-gradient(140deg,#6ddcff,#2DE2E6 48%,#4D95FF);
  box-shadow:0 0 18px rgba(45,226,230,.24), 0 10px 20px rgba(0,0,0,.2);
  letter-spacing:-.2px;
}
.side-brand-name{line-height:1.4}
.side-brand-name strong{
  display:block;
  font-size:16px;
  font-weight:800;
  letter-spacing:.3px;
  color:#F1F5FF;
}
.side-brand-name small{
  font-size:12px;
  color:var(--text-dim);
  letter-spacing:.2px;
}
.side-nav{
  margin-top:10px;
  flex:1;
}
.nav-label{
  font-size:12px;
  font-weight:600;
  color:var(--text-dim);
  letter-spacing:.14em;
  margin:24px 10px 9px;
}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  padding:0 14px;
  margin-bottom:4px;
  border-radius:12px;
  font-size:15px;
  font-weight:600;
  color:var(--text-soft);
  transition:all .22s ease;
}
.nav-link i{width:20px;text-align:center;font-size:16px;color:var(--text-dim);transition:color .22s}
.nav-link:hover{
  background:rgba(255,255,255,.06);
  color:#fff;
  transform:translateX(2px);
}
.nav-link:hover i{color:var(--cyan)}
.nav-link.active{
  background:linear-gradient(90deg,rgba(29,108,255,.22),rgba(255,255,255,.055));
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);
  border-radius:12px;
}
.nav-link.active i{color:var(--cyan)}
.nav-link.active::before{
  content:"";
  position:absolute;
  left:-20px;
  top:13px;
  width:4px;
  height:18px;
  border-radius:99px;
  background:var(--cyan);
  box-shadow:0 0 14px var(--cyan);
}
.side-info{
  margin-top:18px;
  padding:12px 14px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-sm);
}
.live-line{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-soft);
}
.live-line .live-dot{
  width:7px;height:7px;border-radius:50%;
  background:#43E0A6;
  box-shadow:0 0 0 0 rgba(67,224,166,.6);
  animation:pulse 1.8s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(67,224,166,.5)}
  70%{box-shadow:0 0 0 7px rgba(67,224,166,0)}
  100%{box-shadow:0 0 0 0 rgba(67,224,166,0)}
}

/* ---------- 右侧画布 ---------- */
.site-canvas{
  min-height:100vh;
  margin-left:268px;
  position:relative;
  z-index:1;
}
.mobile-bar{
  display:none;
}

/* ---------- 文章结构 ---------- */
.article-shell{
  max-width:1240px;
  margin:0 auto;
  padding:36px 32px 0;
}
.article-lead{
  position:relative;
  overflow:hidden;
  border:1px solid var(--stroke);
  border-radius:24px;
  padding:40px 44px;
  box-shadow:var(--shadow);
  background:
    radial-gradient(720px 260px at 85% -30%, rgba(45,226,230,.16), transparent 65%),
    linear-gradient(118deg,rgba(7,11,23,.94) 20%,rgba(15,24,48,.82)),
    url("/assets/images/backpic/back-1.png") center / cover no-repeat;
}
.article-lead::after{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
}
.breadcrumb-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--text-dim);
  font-weight:600;
  margin-bottom:20px;
  position:relative;
  z-index:1;
}
.breadcrumb-line a{color:var(--text-soft);transition:color .2s}
.breadcrumb-line a:hover{color:var(--cyan)}
.breadcrumb-line i{color:var(--text-dim);font-size:11px}
.article-lead h1{
  position:relative;
  z-index:1;
  font-size:clamp(31px,4.5vw,46px);
  line-height:1.3;
  font-weight:900;
  letter-spacing:-.4px;
  margin:0 0 18px;
  color:white;
  max-width:900px;
}
.article-meta{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 20px;
  font-size:13px;
  color:var(--text-soft);
}
.meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-item i{color:var(--cyan);opacity:.8}
.meta-author{
  display:inline-flex;align-items:center;gap:8px;
  color:#eef3ff;
}
.meta-avatar{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(140deg,var(--primary),var(--cyan));
  display:grid;place-items:center;
  font-size:13px;color:#fff;font-weight:800;
}

/* ---------- 正文纸面 ---------- */
.article-paper{
  margin-top:26px;
  background:rgba(9,14,28,.86);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--stroke);
  border-radius:24px;
  padding:52px 36px 42px;
  box-shadow:var(--shadow);
}
.article-body{
  max-width:780px;
  margin:0 auto;
  font-size:16px;
  line-height:1.9;
  color:#DCE3F2;
}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  font-size:26px;
  font-weight:800;
  line-height:1.45;
  color:#F3F6FD;
  margin:2.1em 0 .8em;
  padding-left:15px;
  border-left:3px solid var(--cyan);
  letter-spacing:-.2px;
}
.article-body h3{
  font-size:21px;
  font-weight:700;
  color:#EDF1FC;
  margin:1.9em 0 .7em;
}
.article-body h4{
  font-size:18px;
  font-weight:700;
  color:#E4E9F6;
  margin:1.7em 0 .55em;
}
.article-body p{margin:0 0 1.45em}
.article-body ul,.article-body ol{
  margin:0 0 1.5em;
  padding-left:1.35em;
}
.article-body li{margin:.45em 0}
.article-body ul li::marker{color:var(--cyan)}
.article-body a{
  color:var(--cyan);
  border-bottom:1px solid rgba(45,226,230,.35);
  transition:border-color .2s,color .2s;
}
.article-body a:hover{color:#7AF3F6;border-color:#7AF3F6}
.article-body blockquote{
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.08);
  border-left:3px solid var(--primary);
  border-radius:0 14px 14px 0;
  padding:18px 20px;
  color:var(--text-soft);
  margin:1.7em 0;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,monospace;
  background:rgba(27,108,255,.13);
  border:1px solid rgba(27,108,255,.16);
  border-radius:7px;
  padding:.1em .42em;
  font-size:.88em;
  color:#BBD4FF;
}
.article-body pre{
  background:#090D1A;
  border:1px solid rgba(255,255,255,.1);
  border-radius:16px;
  padding:18px 20px;
  overflow-x:auto;
  margin:0 0 1.5em;
}
.article-body pre code{
  background:transparent;
  border:0;
  padding:0;
  color:#DCE7FF;
}
.article-body figure{
  margin:1.8em 0;
}
.article-body img{
  border-radius:16px;
  box-shadow:var(--shadow);
  margin:0 auto;
}
.article-body figcaption{
  text-align:center;
  font-size:13px;
  color:var(--text-dim);
  margin-top:.75em;
}
.article-body hr{
  border:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.16),transparent);
  margin:2.1em 0;
}

/* ---------- 标签与正文脚部 ---------- */
.article-foot{
  max-width:780px;
  margin:34px auto 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  border-top:1px solid rgba(255,255,255,.09);
  padding-top:24px;
}
.article-tags{
  display:flex;
  align-items:center;
  gap:8px;
}
.chip-tag{
  padding:5px 14px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.11);
  border-radius:99px;
  font-size:12px;
  font-weight:600;
  color:#CBD5EC;
  transition:.2s;
}
.chip-tag:hover{
  border-color:rgba(45,226,230,.45);
  color:var(--cyan);
}
.article-share-copy{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:13px;
  color:var(--text-soft);
  background:transparent;
  border:1px solid rgba(255,255,255,.14);
  border-radius:10px;
  padding:6px 14px;
  cursor:pointer;
  transition:.2s;
}
.article-share-copy:hover{color:var(--cyan);border-color:rgba(45,226,230,.4)}

/* ---------- 上下导航卡 ---------- */
.pn-grid{
  max-width:100%;
  margin:22px auto 0;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}
.pn-card{
  position:relative;
  display:flex;
  align-items:center;
  gap:15px;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.11);
  border-radius:18px;
  padding:21px 22px;
  overflow:hidden;
  transition:.28s;
}
.pn-card:hover{
  background:rgba(255,255,255,.07);
  transform:translateY(-2px);
  box-shadow:0 16px 34px rgba(0,0,0,.22);
  border-color:rgba(255,255,255,.2);
}
.pn-arrow{
  width:40px;height:40px;
  flex:0 0 auto;
  border-radius:12px;
  display:grid;place-items:center;
  background:rgba(27,108,255,.16);
  border:1px solid rgba(27,108,255,.28);
  color:var(--cyan);
}
.pn-card .pn-small{
  display:block;
  font-size:12px;
  color:var(--text-dim);
  letter-spacing:.05em;
  margin-bottom:3px;
}
.pn-card strong{
  font-size:16px;
  font-weight:700;
  color:#F0F4FF;
  display:block;
}
.pn-right{text-align:right}
.pn-right .pn-arrow{order:2}

/* ---------- 相关频道推荐 ---------- */
.related-section{
  max-width:1240px;
  margin:48px auto 0;
}
.related-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  margin-bottom:20px;
}
.related-header h2{
  font-size:24px;
  font-weight:800;
  margin:0;
  color:#EDF1FC;
  letter-spacing:-.2px;
}
.related-header .related-more{
  font-size:13px;
  color:var(--text-soft);
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color .2s;
}
.related-header .related-more:hover{color:var(--cyan)}
.related-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}
.related-card{
  position:relative;
  display:flex;
  align-items:center;
  gap:20px;
  background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.11);
  border-radius:20px;
  overflow:hidden;
  padding:12px;
  transition:.3s;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.related-card:hover{
  background:rgba(255,255,255,.08);
  transform:translateY(-2px);
  box-shadow:0 22px 44px rgba(0,0,0,.3), 0 0 0 1px rgba(45,226,230,.12);
  border-color:rgba(45,226,230,.35);
}
.related-thumb{
  width:210px;
  min-height:130px;
  border-radius:14px;
  object-fit:cover;
  flex-shrink:0;
}
.related-content{flex:1;padding:6px 8px}
.related-eyebrow{
  display:inline-flex;
  align-items:center;
  background:rgba(27,108,255,.16);
  border:1px solid rgba(27,108,255,.2);
  color:#9CC3FF;
  font-size:12px;
  font-weight:700;
  padding:3px 10px;
  border-radius:99px;
  margin-bottom:10px;
}
.related-card h3{
  font-size:17px;
  font-weight:700;
  color:#F0F3FF;
  margin:0 0 5px;
  line-height:1.5;
}
.related-card p{
  font-size:13px;
  color:var(--text-soft);
  margin:0;
  line-height:1.7;
}
.related-card .go-link{
  color:var(--cyan);
  font-size:13px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:5px;
  margin-top:10px;
}
.related-card .go-link i{transition:transform .2s}
.related-card:hover .go-link i{transform:translateX(3px)}

/* ---------- CTA ---------- */
.article-cta{
  position:relative;
  max-width:1240px;
  margin:44px auto 0;
  overflow:hidden;
  border-radius:24px;
  border:1px solid var(--stroke);
  padding:46px 46px;
  text-align:center;
  background:
    radial-gradient(600px 260px at 50% 0%, rgba(27,108,255,.20), transparent 70%),
    linear-gradient(125deg,rgba(10,16,33,.82),rgba(7,11,23,.95)),
    url("/assets/images/backpic/back-2.png") center / cover no-repeat;
}
.article-cta::before{
  content:"";
  position:absolute;
  inset:1px;
  border-radius:23px;
  pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.12);
}
.article-cta .cta-brand{
  width:52px;height:52px;border-radius:16px;
  margin:0 auto 18px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,#6ddcff,#2DE2E6 48%,#4D95FF);
  box-shadow:0 0 28px rgba(45,226,230,.35);
  font-size:18px;
  font-weight:900;
  color:#081420;
}
.article-cta h2{
  font-size:27px;
  font-weight:800;
  margin:0 0 8px;
  letter-spacing:-.2px;
}
.article-cta p{
  max-width:560px;
  margin:0 auto 24px;
  color:var(--text-soft);
  font-size:15px;
}
.cta-btns{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
}
.btn-primary{
  border:0;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  font-weight:700;
  color:#fff;
  background:linear-gradient(135deg,#1B6CFF 10%,#3E8CFF 60%,#2DE2E6 140%);
  border-radius:12px;
  padding:13px 25px;
  box-shadow:0 10px 28px rgba(27,108,255,.4);
  transition:.25s;
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 16px 36px rgba(27,108,255,.5),0 0 22px rgba(45,226,230,.22);
}
.btn-primary:active{transform:translateY(-1px) scale(.99)}
.btn-primary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  font-weight:600;
  color:var(--text);
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.18);
  border-radius:12px;
  padding:12px 24px;
  cursor:pointer;
  transition:.24s;
}
.btn-ghost:hover{color:var(--cyan);background:rgba(255,255,255,.1);border-color:rgba(45,226,230,.35)}
.btn-ghost:active{transform:scale(.99)}
.empty-state{
  text-align:center;
  padding:46px 24px 34px;
  color:var(--text-soft);
}
.empty-icon{
  width:68px;height:68px;
  border-radius:20px;
  background:rgba(27,108,255,.14);
  border:1px solid rgba(27,108,255,.2);
  display:grid;place-items:center;
  color:var(--cyan);
  font-size:26px;
  margin:0 auto 18px;
}
.empty-state h2{
  font-size:22px;
  margin:0 0 6px;
  color:#EAF0FE;
}
.empty-state p{margin:0 0 22px}
.optional-return-link{
  color:var(--text-soft);
  font-size:14px;
  margin-top:12px;
  display:inline-block;
  transition:color .2s;
}
.optional-return-link:hover,.return-list-link:hover{color:var(--cyan)}
.article-return{
  text-align:center;
  margin-top:22px;
}
.return-list-link{
  font-size:14px;
  color:var(--text-soft);
  display:inline-flex;
  gap:8px;
  align-items:center;
  font-weight:600;
  transition:.2s;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:80px;
  border-top:1px solid rgba(255,255,255,.09);
  background:rgba(6,9,18,.76);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:66px 0 34px;
  position:relative;
}
.site-footer .footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:34px;
  border-bottom:1px dashed rgba(255,255,255,.1);
}
.site-footer .brand-mark{
  width:38px;height:38px;
  border-radius:12px;
  font-size:14px;
  margin-bottom:12px;
}
.site-footer .footer-brand-name{
  font-size:18px;
  font-weight:800;
  color:#EFF3FF;
  letter-spacing:.2px;
}
.site-footer .footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:#98A3BA;
  margin:10px 0 0;
  max-width:280px;
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:#BFC9DC;
  margin:0 0 14px;
  letter-spacing:.06em;
}
.footer-col a{
  display:block;
  color:#8792AB;
  font-size:14px;
  line-height:2.4;
  transition:.2s;
}
.footer-col a:hover{color:var(--cyan)}
.footer-sub{
  font-size:13px;
  color:#7C879F;
  line-height:1.9;
  display:block;
}
.footer-copyright{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  align-items:center;
  padding-top:24px;
  color:#778198;
  font-size:13px;
}
.footer-copyright a{color:#8792AB;transition:.2s}
.footer-copyright a:hover{color:var(--cyan)}
.sep-dot{margin:0 4px}
.footer-legal{display:flex;gap:16px;font-size:13px}

/* ---------- 移动顶栏与抽屉 ---------- */
.mobile-bar{
  position:sticky;
  top:0;
  z-index:70;
  height:64px;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:rgba(5,8,16,.85);
  backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(255,255,255,.09);
}
.mobile-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:15px;
  color:#fff;
}
.mobile-brand .brand-mark-m{
  width:34px;height:34px;
  border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#1B6CFF,#2DE2E6);
  color:#060918;
  font-size:13px;
  font-weight:900;
}
.menu-toggle{
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.06);
  color:#D8DFEB;
  display:grid;
  place-items:center;
  cursor:pointer;
  font-size:17px;
}
.menu-toggle:hover{color:var(--cyan);border-color:rgba(45,226,230,.35)}
.mobile-drawer{
  position:fixed;
  top:0;left:0;bottom:0;
  width:292px;
  background:rgba(6,9,17,.98);
  backdrop-filter:blur(24px);
  z-index:90;
  padding:24px 18px;
  transform:translateX(-105%);
  transition:transform .32s;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 4px 16px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.drawer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:800;
  font-size:15px;
}
.drawer-close{
  width:36px;height:36px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.13);
  background:rgba(255,255,255,.06);
  color:#CBD3E4;
  cursor:pointer;
}
.drawer-close:hover{color:#fff}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(2,4,10,.6);
  backdrop-filter:blur(3px);
  z-index:85;
  opacity:0;
  visibility:hidden;
  transition:.3s;
}
.drawer-mask.is-show{opacity:1;visibility:visible}
body.menu-open{overflow:hidden}
.drawer-bottom{
  margin-top:24px;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;
  gap:10px;
}
.drawer-bottom .btn-ghost{flex:1;justify-content:center;font-size:13px;padding:9px 8px;border-radius:11px}

.toast-tip{
  position:fixed;
  left:50%;
  bottom:42px;
  transform:translateX(-50%) translateY(20px);
  z-index:99;
  background:rgba(14,25,45,.94);
  border:1px solid rgba(255,255,255,.18);
  color:#EDF1FF;
  padding:9px 20px;
  border-radius:12px;
  box-shadow:0 14px 34px rgba(0,0,0,.32),0 0 0 1px rgba(45,226,230,.12);
  opacity:0;
  visibility:hidden;
  transition:.3s;
  font-size:13px;
  white-space:nowrap;
  font-weight:600;
}
.toast-tip.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}

@media (max-width:1199.98px){
  .site-sidebar{width:86px;padding:24px 10px 12px;}
  .site-canvas{margin-left:86px;}
  .brand-mark{width:40px;height:40px}
  .side-nav .nav-link{justify-content:center;padding:0 10px}
  .side-nav .nav-link i{margin:0}
  .side-brand-name,.nav-label,.nav-link .nav-text,.side-info{
    position:absolute;
    width:1px;
    height:1px;
    overflow:hidden;
    clip:rect(0 0 0 0);
    white-space:nowrap;
  }
  .nav-link{width:48px;margin-inline:auto}
  .nav-link.active::before{left:-10px}
  .side-brand-link{justify-content:center;padding-inline:0}
}

@media (max-width:767.98px){
  .site-sidebar{display:none}
  .site-canvas{margin-left:0}
  .mobile-bar{display:flex}
  .article-shell{padding:18px 14px 0}
  .article-lead{padding:30px 22px;border-radius:20px}
  .article-lead h1{font-size:28px}
  .article-paper{padding:28px 18px 26px;border-radius:20px;margin-top:16px}
  .article-body{font-size:15px;line-height:1.85}
  .article-body h2{font-size:22px}
  .pn-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .related-card{flex-direction:column;align-items:stretch;text-align:center}
  .related-thumb{width:100%;height:auto;min-height:180px}
  .article-cta{padding:34px 20px;margin-top:26px}
  .article-cta h2{font-size:22px}
  .site-footer{padding:46px 0 24px}
  .site-footer .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-copyright{flex-direction:column;align-items:flex-start}
  .footer-legal{flex-wrap:wrap}
  .brand-mark{width:40px;height:40px}
  .article-foot{justify-content:flex-start}
  .meta-item.gap-wrap{flex-wrap:wrap}
}

@media (max-width:420px){
  .related-thumb{min-height:140px}
  .article-lead h1{font-size:24px}
  .article-cta .btn{width:100%;justify-content:center}
}

/* roulang page: category2 */
:root{
    --bg:#070b17;
    --bg-2:#0b1020;
    --panel:rgba(255,255,255,.06);
    --panel-strong:rgba(255,255,255,.105);
    --line:rgba(255,255,255,.13);
    --line-soft:rgba(255,255,255,.06);
    --primary:#1b6cff;
    --primary-2:#22a7ff;
    --cyan:#55e6ff;
    --violet:#8b5cf6;
    --text:#e9eef7;
    --text-2:#c6d0e1;
    --muted:#8b95ad;
    --radius-lg:20px;
    --radius-md:14px;
    --radius-sm:10px;
    --shadow-lg:0 22px 50px rgba(0,0,0,.4),0 0 0 1px rgba(255,255,255,.06);
    --shadow-md:0 14px 30px rgba(0,0,0,.32);
    --shadow-glow:0 0 26px rgba(27,108,255,.28);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:Inter,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
}
body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:-2;
    pointer-events:none;
    background:
        linear-gradient(rgba(85,230,255,.025) 1px,transparent 1px),
        linear-gradient(90deg,rgba(85,230,255,.02) 1px,transparent 1px);
    background-size:42px 42px;
}
body::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:-1;
    pointer-events:none;
    background:
        radial-gradient(920px 480px at 85% -5%,rgba(27,108,255,.26),transparent 60%),
        radial-gradient(820px 480px at 10% 110%,rgba(139,92,246,.2),transparent 60%);
}
a{color:inherit;text-decoration:none}
a:focus-visible{
    outline:2px solid var(--cyan);
    outline-offset:3px;
    border-radius:6px;
}
img{max-width:100%;display:block;border:0}
button{font:inherit;background:none;border:none;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.3;font-weight:800}
h2{font-size:clamp(26px,3vw,34px)}
h3{font-size:19px}
i{line-height:1}
::selection{background:rgba(85,230,255,.2);color:#fff}
.wrap{
    width:100%;
    max-width:1200px;
    margin-inline:auto;
    padding-inline:32px;
}

/* ---------- App shell nav ---------- */
.site-shell{min-height:100vh;position:relative}
.sidebar{
    position:fixed;
    left:0;
    top:0;
    bottom:0;
    z-index:60;
    width:248px;
    padding:22px 16px 18px;
    display:flex;
    flex-direction:column;
    background:rgba(7,10,19,.94);
    border-right:1px solid var(--line-soft);
    backdrop-filter:blur(18px);
}
.brand-box{
    display:flex;
    align-items:center;
    gap:12px;
    padding:6px 4px 20px;
    border-bottom:1px solid var(--line-soft);
}
.brand-mark{
    display:flex;
    align-items:center;
    justify-content:center;
    width:42px;
    height:42px;
    flex:0 0 auto;
    border-radius:12px;
    background:linear-gradient(135deg,#1b6cff,#55e6ff);
    color:#081018;
    font-weight:900;
    font-size:20px;
    box-shadow:0 0 22px rgba(27,108,255,.32);
}
.brand-info{display:flex;flex-direction:column;min-width:0}
.brand-name{font-weight:800;font-size:16px;line-height:1.3;white-space:nowrap}
.brand-badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:11px;
    color:var(--muted);
    margin-top:2px;
    letter-spacing:.04em;
}
.status-dot{
    width:6px;
    height:6px;
    border-radius:50%;
    background:#34d399;
    box-shadow:0 0 8px #34d399;
}
.side-nav{flex:1;overflow-y:auto}
.nav-label{
    font-size:11px;
    font-weight:600;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:#5b677f;
    padding:22px 10px 7px;
}
.nav-link{
    position:relative;
    display:flex;
    align-items:center;
    gap:12px;
    min-height:44px;
    padding:0 13px;
    border-radius:12px;
    color:#aab5ca;
    font-size:15px;
    font-weight:500;
    transition:all .22s ease;
    border:1px solid transparent;
}
.nav-link i{
    width:20px;
    text-align:center;
    font-size:18px;
    color:#76829c;
    transition:color .2s ease;
}
.nav-link:hover{
    color:#fff;
    background:rgba(255,255,255,.09);
}
.nav-link:hover i{color:var(--cyan)}
.nav-link.active{
    color:#fff;
    background:linear-gradient(135deg,rgba(27,108,255,.24),rgba(85,230,255,.08));
    border-color:rgba(85,230,255,.22);
    box-shadow:inset 0 0 22px rgba(27,108,255,.08);
}
.nav-link.active i{color:var(--cyan)}
.nav-link.active::before{
    content:"";
    width:5px;
    height:5px;
    border-radius:50%;
    background:var(--cyan);
    box-shadow:0 0 12px var(--cyan);
    margin-right:1px;
    flex:0 0 auto;
}
.side-foot{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    padding-top:16px;
    border-top:1px solid var(--line-soft);
}
.side-icon{
    width:38px;
    height:38px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:10px;
    color:#8791aa;
    background:rgba(255,255,255,.05);
    border:1px solid transparent;
    transition:all .22s ease;
}
.side-icon:hover{
    color:var(--cyan);
    background:rgba(85,230,255,.08);
    border-color:rgba(85,230,255,.2);
}
.page-main{
    margin-left:248px;
    min-height:100vh;
    position:relative;
}

/* ---------- Mobile header / drawer ---------- */
.mobile-header{
    display:none;
    position:sticky;
    top:0;
    z-index:72;
    align-items:center;
    justify-content:space-between;
    height:64px;
    padding:0 16px;
    background:rgba(7,10,19,.84);
    border-bottom:1px solid var(--line-soft);
    backdrop-filter:blur(16px);
}
.mobile-brand{
    display:inline-flex;
    align-items:center;
    gap:9px;
    font-weight:800;
    font-size:16px;
}
.mobile-brand .brand-mark{width:32px;height:32px;font-size:15px;border-radius:9px}
.icon-btn{
    width:42px;
    height:42px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border-radius:12px;
    color:var(--text-2);
    background:rgba(255,255,255,.06);
    border:1px solid var(--line);
    cursor:pointer;
    transition:all .2s ease;
}
.icon-btn:hover{color:#fff;border-color:rgba(85,230,255,.4)}
.drawer{
    position:fixed;
    top:0;
    bottom:0;
    left:0;
    z-index:92;
    width:min(340px,86vw);
    padding:22px;
    overflow-y:auto;
    background:#090d19;
    border-right:1px solid var(--line);
    box-shadow:18px 0 50px rgba(0,0,0,.35);
    transform:translateX(-100%);
    transition:transform .32s ease;
}
.drawer.show{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line-soft)}
.drawer-backdrop{
    position:fixed;
    inset:0;
    z-index:88;
    background:rgba(1,3,10,.6);
    opacity:0;
    pointer-events:none;
    transition:opacity .3s ease;
}
.drawer-backdrop.show{opacity:1;pointer-events:auto}

/* ---------- Page main core ---------- */
.category-hero{
    position:relative;
    display:flex;
    align-items:center;
    min-height:46vh;
    padding:74px 0 78px;
    overflow:hidden;
    text-align:center;
    border-bottom:1px solid var(--line-soft);
}
.hero-bg{
    position:absolute;
    inset:0;
    background-size:cover;
    background-position:center;
    opacity:.34;
}
.hero-overlay{
    position:absolute;
    inset:0;
    background:
        linear-gradient(180deg,rgba(7,11,23,.38),rgba(7,11,23,.92) 88%),
        linear-gradient(90deg,rgba(27,108,255,.2),transparent 72%);
}
.hero-content{position:relative;z-index:4}
.hero-kicker{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:12px;
    color:var(--cyan);
    background:rgba(85,230,255,.07);
    border:1px solid rgba(85,230,255,.18);
    border-radius:999px;
    padding:6px 14px;
    letter-spacing:.06em;
}
.hero-title{
    font-size:clamp(42px,7vw,66px);
    font-weight:900;
    line-height:1.08;
    margin:16px 0 10px;
    background:linear-gradient(180deg,#fff,#bfdcff);
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
    text-shadow:0 12px 40px rgba(27,108,255,.15);
}
.hero-sub{
    max-width:700px;
    margin:0 auto 28px;
    color:var(--text-2);
    font-size:17px;
}
.hero-actions{
    display:flex;
    flex-wrap:wrap;
    gap:14px;
    justify-content:center;
}
.hero-scroll{
    position:absolute;
    left:50%;
    bottom:18px;
    transform:translateX(-50%);
    width:22px;
    height:34px;
    border:1px solid rgba(255,255,255,.32);
    border-radius:30px;
    display:flex;
    justify-content:center;
    padding-top:7px;
    z-index:5;
}
.hero-scroll span{
    width:3px;
    height:7px;
    border-radius:3px;
    background:var(--cyan);
    animation:scrollDot 1.8s infinite ease-in-out;
}
@keyframes scrollDot{
    0%{opacity:0;transform:translateY(0)}
    40%{opacity:1}
    100%{opacity:0;transform:translateY(12px)}
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
    display:flex;
    justify-content:center;
    font-size:13px;
    color:var(--muted);
    margin-bottom:20px;
}
.breadcrumb a{color:var(--muted);transition:color .2s}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb li{display:inline-flex;align-items:center;gap:10px}
.breadcrumb li+li::before{content:"/";opacity:.55}
.breadcrumb .has-arrow i{font-size:11px;margin:0 4px 0 6px}

/* ---------- Buttons ---------- */
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 22px;
    border-radius:10px;
    font-weight:600;
    font-size:15px;
    line-height:1.2;
    cursor:pointer;
    transition:all .25s ease;
}
.btn:focus-visible,.side-icon:focus-visible,.icon-btn:focus-visible{
    outline:2px solid var(--cyan);
    outline-offset:3px;
}
.btn-glow{
    background:linear-gradient(135deg,#1b6cff,#21c7e8);
    color:#02060d;
    border:none;
    box-shadow:0 0 24px rgba(27,108,255,.3);
}
.btn-glow:hover{
    transform:translateY(-2px);
    box-shadow:0 0 38px rgba(85,230,255,.4);
}
.btn-glow:active{transform:translateY(0) scale(.98);box-shadow:0 0 14px rgba(27,108,255,.35)}
.btn-glass{
    background:rgba(255,255,255,.075);
    color:#fff;
    border:1px solid rgba(255,255,255,.2);
    backdrop-filter:blur(10px);
}
.btn-glass:hover{
    background:rgba(255,255,255,.15);
    border-color:rgba(85,230,255,.45);
    transform:translateY(-1px);
}
.btn-glass:active{transform:translateY(0) scale(.98)}
.btn-sm{padding:9px 16px;font-size:13px}

/* ---------- Section patterns ---------- */
.section-block{padding:86px 0}
.section-block+.section-block{padding-top:10px}
.section-heading{
    display:flex;
    flex-wrap:wrap;
    align-items:flex-end;
    gap:14px;
    margin-bottom:30px;
}
.section-heading-top{
    display:flex;
    flex-direction:column;
    flex:1 1 auto;
    min-width:260px;
}
.section-index{
    width:46px;
    height:46px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:13px;
    color:var(--cyan);
    font-weight:800;
    font-size:14px;
    background:rgba(85,230,255,.08);
    border:1px solid rgba(85,230,255,.24);
    flex:0 0 auto;
}
.section-heading .section-heading-top h2{margin-bottom:4px}
.section-heading .section-heading-top p{color:var(--muted);max-width:700px;margin:0}

/* ---------- Directory ---------- */
.section-directory{padding:34px 0 8px}
.directory-card{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:16px;
    background:rgba(255,255,255,.055);
    border:1px solid var(--line);
    border-radius:18px;
    padding:16px 18px;
    backdrop-filter:blur(14px);
    box-shadow:var(--shadow-md);
}
.dir-label{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--muted);
    font-weight:600;
    font-size:14px;
    white-space:nowrap;
}
.dir-label i{color:var(--cyan);font-size:16px}
.dir-list{display:flex;flex-wrap:wrap;gap:8px}
.dir-list a{
    display:inline-flex;
    align-items:center;
    gap:6px;
    color:var(--text-2);
    font-size:14px;
    padding:7px 13px;
    border-radius:10px;
    background:rgba(255,255,255,.06);
    border:1px solid transparent;
    transition:all .2s ease;
}
.dir-list a span{font-weight:800;color:var(--cyan);font-size:12px}
.dir-list a:hover{
    color:#fff;
    background:rgba(85,230,255,.09);
    border-color:rgba(85,230,255,.25);
}

/* ---------- Glass cards ---------- */
.glass-card{
    position:relative;
    background:rgba(255,255,255,.06);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    backdrop-filter:blur(14px);
    box-shadow:var(--shadow-md);
    overflow:hidden;
}
.glass-card::before{
    content:"";
    position:absolute;
    left:16px;
    right:16px;
    top:0;
    height:1px;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.28),transparent);
    z-index:2;
}

/* ---------- Services area ---------- */
.service-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.service-lead{grid-column:span 7;display:grid;grid-template-columns:.93fr 1.07fr;min-height:360px}
.service-cover{position:relative;min-height:100%;overflow:hidden}
.service-cover img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius-lg) 0 0 var(--radius-lg);transition:transform .7s ease}
.service-lead:hover .service-cover img{transform:scale(1.04)}
.service-detail{
    padding:30px 26px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:flex-start;
    gap:14px;
}
.badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:12px;
    font-weight:600;
    color:var(--cyan);
    background:rgba(85,230,255,.08);
    border:1px solid rgba(85,230,255,.17);
    border-radius:999px;
    padding:5px 11px;
}
.service-detail h3{font-size:21px;margin:0}
.service-detail p{color:var(--text-2);font-size:15px;margin:0}
.mini-wrap{grid-column:span 5;display:flex;flex-direction:column;gap:24px}
.service-mini{
    display:block;
    padding:24px 24px 26px;
    background:rgba(255,255,255,.055);
    border:1px solid var(--line);
    border-radius:18px;
    backdrop-filter:blur(12px);
    transition:all .28s ease;
}
.service-mini::before{left:14px;right:14px}
.service-mini:hover{
    background:rgba(255,255,255,.09);
    transform:translateY(-2px);
    border-color:rgba(85,230,255,.25);
    box-shadow:0 18px 36px rgba(0,0,0,.28);
}
.mini-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.mini-ico{
    width:40px;
    height:40px;
    border-radius:11px;
    color:var(--cyan);
    background:rgba(85,230,255,.09);
    border:1px solid rgba(85,230,255,.18);
    display:flex;
    align-items:center;
    justify-content:center;
    flex:0 0 auto;
    font-size:17px;
}
.mini-head h3{font-size:17px;margin:0}
.service-mini>p{color:var(--text-2);font-size:14px;margin:0 0 14px}
.mini-link{
    display:inline-flex;
    align-items:center;
    gap:7px;
    color:var(--cyan);
    font-size:13px;
    font-weight:600;
    transition:gap .2s ease;
}
.mini-link:hover{gap:11px}
.mini-link i{font-size:12px}

/* ---------- Feature highlights ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-card{
    padding:26px 22px;
    border-radius:18px;
    background:rgba(255,255,255,.055);
    border:1px solid var(--line);
    backdrop-filter:blur(12px);
    transition:all .28s ease;
}
.feature-card:hover{
    transform:translateY(-3px);
    border-color:rgba(85,230,255,.27);
    box-shadow:0 20px 38px rgba(0,0,0,.3);
}
.feature-ico{
    width:46px;
    height:46px;
    border-radius:13px;
    margin-bottom:16px;
    display:flex;
    align-items:center;
    justify-content:center;
    color:#101a2e;
    font-size:18px;
    background:linear-gradient(135deg,#1b6cff,#55e6ff);
    box-shadow:0 0 18px rgba(27,108,255,.25);
}
.feature-card h3{font-size:17px;margin:0 0 8px}
.feature-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}

/* ---------- Split scenario ---------- */
.split-card{
    display:grid;
    grid-template-columns:1fr 1.1fr;
    gap:0;
    border-radius:22px;
    background:rgba(255,255,255,.05);
    border:1px solid var(--line);
    backdrop-filter:blur(14px);
    overflow:hidden;
}
.split-media{position:relative;min-height:420px}
.split-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.split-media::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(90deg,transparent,rgba(10,16,30,.6));
}
.split-body{padding:38px 34px}
.scene-points{display:grid;gap:16px;margin-top:20px}
.scene-point{
    display:flex;
    gap:12px;
    align-items:flex-start;
    background:rgba(255,255,255,.055);
    border:1px solid rgba(255,255,255,.07);
    border-radius:14px;
    padding:14px;
}
.scene-point .scene-ico{
    color:var(--cyan);
    background:rgba(85,230,255,.09);
    border:1px solid rgba(85,230,255,.12);
    width:34px;
    height:34px;
    flex:0 0 auto;
    border-radius:10px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:15px;
}
.scene-point strong{font-size:15px;display:block;margin-bottom:2px}
.scene-point p{font-size:13px;color:var(--muted);margin:0}

/* ---------- Process ---------- */
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.process-step{
    position:relative;
    padding:24px 20px;
    border-radius:18px;
    background:rgba(255,255,255,.055);
    border:1px solid var(--line);
    backdrop-filter:blur(12px);
    transition:all .3s ease;
}
.process-step:hover{
    background:rgba(255,255,255,.095);
    transform:translateY(-3px);
    border-color:rgba(85,230,255,.27);
}
.process-num{
    font-size:30px;
    font-weight:900;
    line-height:1;
    display:block;
    margin-bottom:16px;
    background:linear-gradient(135deg,#1b6cff,#55e6ff);
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
}
.process-step h3{font-size:17px;margin:0 0 8px}
.process-step p{font-size:14px;color:var(--muted);margin:0}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;margin:0 auto}
.faq-item{
    margin-bottom:14px;
    border:1px solid rgba(255,255,255,.11);
    border-radius:16px;
    background:rgba(255,255,255,.05);
    backdrop-filter:blur(14px);
    overflow:hidden;
    transition:border-color .25s ease,background .25s ease;
}
.faq-item[open]{
    border-color:rgba(85,230,255,.25);
    background:rgba(255,255,255,.07);
}
.faq-item summary{
    cursor:pointer;
    list-style:none;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    padding:18px 22px;
    font-size:15px;
    font-weight:600;
    color:#edf2fc;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
    content:"+";
    width:26px;
    height:26px;
    flex:0 0 auto;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:8px;
    font-size:18px;
    color:var(--cyan);
    background:rgba(85,230,255,.1);
    border:1px solid rgba(85,230,255,.2);
    transition:all .25s ease;
}
.faq-item[open] summary::after{
    content:"−";
    background:rgba(85,230,255,.2);
}
.faq-item p{
    margin:0;
    padding:0 22px 20px;
    color:var(--text-2);
    font-size:14px;
    line-height:1.8;
}

/* ---------- CTA ---------- */
.cta-block{padding:72px 0}
.cta-panel{
    position:relative;
    overflow:hidden;
    text-align:center;
    padding:52px 40px;
    border-radius:24px;
    background:rgba(10,16,30,.7);
    border:1px solid rgba(85,230,255,.2);
    backdrop-filter:blur(18px);
    box-shadow:var(--shadow-lg);
}
.cta-panel::before{
    content:"";
    position:absolute;
    top:-80px;
    left:50%;
    transform:translateX(-50%);
    width:520px;
    height:250px;
    background:radial-gradient(closest-side,rgba(27,108,255,.25),transparent);
    pointer-events:none;
}
.cta-panel h2{position:relative}
.cta-panel p{position:relative;color:var(--text-2);max-width:580px;margin:0 auto 26px}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.cta-brand{
    position:relative;
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--muted);
    margin-bottom:12px;
}
.cta-brand .brand-mark{width:28px;height:28px;font-size:14px;border-radius:8px}

/* ---------- Footer ---------- */
.site-footer{
    padding:68px 0 26px;
    border-top:1px solid rgba(255,255,255,.08);
    background:rgba(8,12,22,.84);
    backdrop-filter:blur(14px);
    margin-top:20px;
}
.footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr 1.15fr;
    gap:40px;
}
.footer-brand p,
.footer-sub{
    color:var(--muted);
    font-size:14px;
    line-height:1.8;
    margin:14px 0 0;
}
.footer-brand-name,.footer-brand strong{
    font-size:16px;
    font-weight:800;
    display:block;
    margin-top:12px;
}
.footer-brand .brand-mark{
    width:46px;
    height:46px;
    border-radius:14px;
}
.footer-col{display:flex;flex-direction:column;gap:9px;align-items:flex-start}
.footer-col h4{
    font-size:13px;
    letter-spacing:.1em;
    color:#fff;
    margin:0 0 6px;
}
.footer-col a,.footer-col span{
    color:var(--muted);
    font-size:14px;
    transition:color .2s;
}
.footer-col a:hover{color:var(--cyan)}
.footer-col .footer-sub{display:block;margin-top:0}
.footer-copyright{
    display:flex;
    flex-direction:row;
    flex-wrap:wrap;
    justify-content:space-between;
    gap:12px;
    margin-top:46px;
    padding-top:24px;
    border-top:1px solid rgba(255,255,255,.08);
    color:var(--muted);
    font-size:13px;
}
.footer-copyright a{color:var(--text-2)}
.footer-copyright a:hover{color:var(--cyan)}
.footer-legal{display:flex;gap:12px;flex-wrap:wrap}
.sep-dot{opacity:.5}

/* ---------- Responsive ---------- */
@media(min-width:768px) and (max-width:1199px){
    .sidebar{
        width:86px;
        padding:20px 12px;
    }
    .page-main{margin-left:86px}
    .brand-box{
        justify-content:center;
        padding-inline:0;
    }
    .brand-info,.nav-label,.nav-text,.side-foot{
        display:none;
    }
    .brand-mark{
        width:40px;
        height:40px;
    }
    .nav-link{
        justify-content:center;
        padding:0;
        height:46px;
    }
    .nav-link i{margin:0}
    .nav-link.active::before{display:none}
    .wrap{padding-inline:24px}
    .section-block{padding:68px 0}
    .feature-grid{grid-template-columns:repeat(2,1fr)}
    .process-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:28px}
}
@media(max-width:767px){
    .sidebar{display:none}
    .page-main{margin-left:0}
    .mobile-header{display:flex}
    .drawer{margin-top:64px}
    .drawer-head-main{padding:14px 4px 11px}
    .wrap{padding-inline:18px}
    .category-hero{min-height:auto;padding:52px 0 64px}
    .hero-title{font-size:37px}
    .hero-sub{font-size:15px}
    .hero-actions .btn{width:100%;max-width:280px;margin-inline:auto}
    .section-block{padding:54px 0}
    .section-heading{align-items:flex-start}
    .directory-card{padding:14px 12px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px 18px}
    .footer-brand{grid-column:1/-1}
}
@media(max-width:1023px){
    .service-lead{grid-column:1/-1;grid-template-columns:1fr}
    .service-cover{min-height:260px}
    .service-cover img{border-radius:18px 18px 0 0}
    .mini-wrap{grid-column:1/-1}
    .split-card{grid-template-columns:1fr}
    .split-media{min-height:260px}
    .split-media::after{background:linear-gradient(180deg,transparent,rgba(10,16,30,.5))}
    .feature-grid{grid-template-columns:repeat(2,1fr)}
    .process-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
    .feature-grid{grid-template-columns:1fr}
    .process-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .footer-copyright{flex-direction:column}
    .cta-panel{padding:42px 24px}
    .split-body{padding:26px 20px}
    .service-detail{padding:26px 20px}
}

/* roulang page: category3 */
:root {
  --bg-color: #070B17;
  --bg-soft: #0D1426;
  --glass-bg: rgba(255,255,255,0.055);
  --glass-border: rgba(255,255,255,0.14);
  --brand-blue: #1B6CFF;
  --brand-cyan: #55E6FF;
  --brand-purple: #7A6CFF;
  --text-main: #E6ECF8;
  --text-sub: #A5B0C7;
  --text-faint: #76839C;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background:
    radial-gradient(circle at 82% 8%, rgba(43, 226, 230, 0.12), transparent 30%),
    radial-gradient(circle at 2% 100%, rgba(122, 108, 255, 0.15), transparent 34%),
    var(--bg-color);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }

.container-x {
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}

/* 移动端顶栏 */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 80;
  height: 64px;
  align-items: center;
  gap: 14px;
  padding: 0 16px;
  background: rgba(7, 11, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.mobile-logo {
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.02em;
}

.nav-toggle-btn {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 12px;
  background: rgba(255,255,255,0.06);
  color: #fff;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.pulse-dot {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-sub);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 4px 10px;
  border-radius: 999px;
}

.pulse-dot::before {
  content: "";
  width: 7px;
  height: 7px;
  background: #2DE2E6;
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(45, 226, 230, 0.9);
}

/* 左侧导航 */
.side-nav {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 260px;
  z-index: 100;
  padding: 22px 16px;
  background: rgba(9, 14, 28, 0.92);
  backdrop-filter: blur(24px);
  border-right: 1px solid rgba(255,255,255,0.11);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: transform 0.32s ease;
}

.nav-brand-row {
  display: flex;
  flex-direction: column;
  padding: 0 8px 22px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 18px;
}

.nav-brand-main {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 900;
  font-size: 18px;
  color: #fff;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-brand-main .mini-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1B6CFF, #2DE2E6);
  color: #fff;
  font-size: 14px;
  flex: 0 0 auto;
  box-shadow: 0 8px 22px rgba(27,108,255,0.35);
}

.nav-status-line {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-sub);
  padding-left: 2px;
  white-space: nowrap;
}

.nav-status-line::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #2DE2E6;
  box-shadow: 0 0 10px rgba(45,226,230,0.85);
}

.nav-label {
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.16em;
  font-weight: 600;
  padding: 0 12px 8px;
  margin-top: 10px;
  text-transform: uppercase;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
  margin-bottom: 6px;
  padding: 0 12px;
  border-radius: 14px;
  color: var(--text-sub);
  font-size: 15px;
  font-weight: 500;
  transition: background 0.22s ease, color 0.22s ease, transform 0.22s ease;
}

.nav-link i {
  width: 20px;
  text-align: center;
  font-size: 15px;
  color: inherit;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.08);
  transform: translateX(3px);
}

.nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(27,108,255,0.22), rgba(45,226,230,0.12));
  border: 1px solid rgba(85,230,255,0.22);
  box-shadow: 0 10px 26px rgba(27,108,255,0.16);
}

.nav-link.active::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-cyan);
  box-shadow: 0 0 12px var(--brand-cyan);
  flex: 0 0 auto;
  margin-right: -2px;
}

.nav-bottom {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 12px;
  color: var(--text-faint);
}

/* 主内容 */
.main-shell {
  position: relative;
  z-index: 1;
  margin-left: 260px;
  min-height: 100vh;
}

/* 页面 Hero */
.page-hero {
  position: relative;
  min-height: 46vh;
  display: flex;
  align-items: center;
  padding: 72px 0;
  background:
    linear-gradient(112deg, rgba(7,11,23,0.88) 8%, rgba(7,11,23,0.45) 58%, rgba(13,20,38,0.55) 100%),
    url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(85,230,255,0.5), transparent);
}

.page-hero .hero-inner {
  position: relative;
  z-index: 2;
  max-width: 960px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--brand-cyan);
  background: rgba(85,230,255,0.1);
  border: 1px solid rgba(85,230,255,0.22);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(36px, 5vw, 62px);
  font-weight: 900;
  line-height: 1.15;
  color: #fff;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-sub);
  max-width: 720px;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 面包屑 */
.breadcrumb-wrap {
  padding-top: 0;
  background: linear-gradient(180deg, rgba(7,11,23,0.5), transparent);
}

.breadcrum {
  font-size: 13px;
  color: var(--text-sub);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 18px 0 4px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 18px;
}

.breadcrum a {
  color: var(--text-faint);
  transition: color 0.2s;
}

.breadcrum a:hover { color: var(--brand-cyan); }
.breadcrum span { color: var(--text-main); }

/* 锚点目录 */
.quick-index-section {
  padding: 22px 0 18px;
}

.index-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  padding: 0;
  margin-bottom: 28px;
}

.index-strip-title {
  font-size: 14px;
  font-weight: 700;
  margin-right: 6px;
  color: #dfeeff;
}

.index-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.13);
  color: var(--text-sub);
  font-size: 14px;
  transition: var(--transition);
}

.index-pill i { font-size: 12px; color: var(--brand-cyan); }
.index-pill:hover {
  color: #fff;
  background: rgba(27,108,255,0.2);
  border-color: rgba(85,230,255,0.45);
  transform: translateY(-1px);
}

.welcome-note {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 14px;
}

.welcome-note strong {
  color: #fff;
  font-weight: 700;
}

/* 板块通用 */
.section {
  padding: 70px 0 36px;
}

.section-sub {
  color: var(--text-sub);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 38px;
}

.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 900;
  color: #fff;
  margin: 0 0 10px;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-lead {
  color: var(--text-sub);
  font-size: 15px;
  max-width: 560px;
  margin: 0;
}

.eyebrow-sm {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--brand-cyan);
  margin-bottom: 10px;
  letter-spacing: 0.12em;
  font-weight: 600;
}

/* 帮助内容栏 */
.help-block {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 44px;
  align-items: center;
  padding: 40px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.help-block:last-child { border-bottom: 0; }

.help-figure {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.13);
  box-shadow: 0 24px 48px rgba(0,0,0,0.3);
  aspect-ratio: 4 / 3;
}

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

.help-figure:hover img { transform: scale(1.05); }

.help-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 65%, rgba(7,11,23,0.4));
  pointer-events: none;
}

.help-tag {
  position: absolute;
  top: 16px; left: 16px;
  z-index: 2;
  background: rgba(7,11,23,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.help-body h3 {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin: 0 0 12px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.help-body > p {
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.9;
  margin: 0 0 18px;
}

.help-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.help-list li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: #cdd7ea;
  font-size: 14px;
  transition: color 0.2s;
}

.help-list li::before {
  content: "\f058";
  font-family: "Font Awesome 6 Free";
  font-weight: 400;
  position: absolute;
  left: 0; top: 9px;
  color: var(--brand-cyan);
  opacity: 0.8;
}

.help-list li:hover { color: #fff; }

/* 技术流程 */
.flow-section {
  background: rgba(255,255,255,0.025);
  border-top: 1px solid rgba(255,255,255,0.09);
  border-bottom: 1px solid rgba(255,255,255,0.09);
  padding: 72px 0;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.flow-card {
  background: rgba(255,255,255,0.055);
  border: 1px solid rgba(255,255,255,0.13);
  border-radius: 22px;
  padding: 26px 22px;
  position: relative;
  transition: var(--transition);
}

.flow-card:hover {
  transform: translateY(-4px);
  border-color: rgba(85,230,255,0.35);
  box-shadow: 0 16px 32px rgba(0,0,0,0.22);
}

.flow-num {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 900;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, #1B6CFF, #2DE2E6);
  box-shadow: 0 10px 26px rgba(27,108,255,0.3);
  margin-bottom: 18px;
}

.flow-card h4 {
  font-size: 17px;
  color: #fff;
  font-weight: 700;
  margin: 0 0 10px;
}

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

/* FAQ */
.faq-section {
  padding: 80px 0 40px;
}

.faq-wrap {
  max-width: 850px;
  margin: 0 auto;
}

details.faq-item {
  background: rgba(255,255,255,0.045);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 20px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.25s ease;
}

details.faq-item[open] {
  border-color: rgba(85,230,255,0.28);
  background: rgba(255,255,255,0.07);
}

.faq-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  cursor: pointer;
  padding: 20px 22px;
  color: #ecf1fa;
  font-weight: 600;
  font-size: 16px;
  line-height: 1.5;
}

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

.faq-num {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  color: #fff;
  background: rgba(27,108,255,0.18);
  border: 1px solid rgba(85,230,255,0.25);
}

.faq-q { flex: 1; }

.faq-arrow {
  margin-left: auto;
  color: var(--brand-cyan);
  font-size: 14px;
  transition: transform 0.3s ease;
}

details.faq-item[open] .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px 70px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.9;
}

.faq-answer p { margin: 0; }

/* CTA */
.cta-section {
  padding: 60px 0 80px;
}

.cta-box {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(85,230,255,0.25);
  border-radius: 26px;
  padding: clamp(28px, 5vw, 64px);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(27,108,255,0.18);
}

.cta-box::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(85,230,255,0.12), transparent 68%);
  top: -160px; left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

.cta-icon {
  width: 62px;
  height: 62px;
  border-radius: 18px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(27,108,255,0.25), rgba(45,226,230,0.15));
  border: 1px solid rgba(85,230,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
}

.cta-box h2 {
  font-size: 28px;
  font-weight: 900;
  color: #fff;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.cta-box p {
  color: var(--text-sub);
  font-size: 15px;
  max-width: 620px;
  margin: 0 auto 26px;
  line-height: 1.85;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 0;
  padding: 13px 22px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #1B6CFF, #21a8d6, #2DE2E6);
  box-shadow: 0 0 22px rgba(27,108,255,0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 32px rgba(85,230,255,0.4);
}

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

.btn-ghost {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  color: #e6ecf8;
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(85,230,255,0.45);
  transform: translateY(-2px);
}

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

:focus-visible {
  outline: 2px solid #55E6FF;
  outline-offset: 4px;
  border-radius: 8px;
}

/* Footer */
.site-footer {
  background: rgba(9, 14, 28, 0.96);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 54px 0 0;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.15fr;
  gap: 40px;
  margin-bottom: 36px;
}

.footer-brand { min-width: 0; }

.footer-brand .brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1B6CFF, #2DE2E6);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 14px;
  box-shadow: 0 8px 24px rgba(27,108,255,0.3);
}

.footer-brand-name {
  font-size: 17px;
  color: #fff;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.footer-brand p {
  color: var(--text-faint);
  font-size: 14px;
  line-height: 1.9;
  margin: 0;
  max-width: 360px;
}

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 16px;
  letter-spacing: 0.04em;
}

.footer-col a {
  display: block;
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 11px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-col a:hover {
  color: var(--brand-cyan);
  transform: translateX(3px);
}

.footer-sub {
  color: var(--text-faint);
  font-size: 13px;
  line-height: 1.9;
  display: block;
}

.footer-copyright {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 20px 0 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: var(--text-faint);
  font-size: 13px;
}

.footer-copyright a {
  color: var(--text-faint);
}

.footer-copyright a:hover { color: var(--brand-cyan); }

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

.sep-dot { opacity: 0.6; }

/* 响应式 */
@media (max-width: 1199px) and (min-width: 768px) {
  .side-nav {
    width: 88px;
    padding: 16px 12px;
    align-items: center;
  }

  .nav-brand-row {
    align-items: center;
    padding: 0 0 18px;
    width: 100%;
  }

  .nav-brand-main {
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    white-space: normal;
    text-align: center;
  }

  .nav-brand-main .brand-full-text { display: none; }
  .nav-brand-main::after {
    content: "九游在线";
    font-size: 12px;
    font-weight: 800;
    color: #fff;
  }

  .nav-status-line { display: none; }

  .nav-label {
    font-size: 0;
    width: 36px;
    height: 1px;
    background: rgba(255,255,255,0.12);
    padding: 0;
    margin: 10px auto 14px;
    overflow: hidden;
  }

  .nav-label:first-of-type { display: none; }

  .nav-link {
    justify-content: center;
    width: 56px;
    height: 52px;
    margin-inline: auto;
    padding: 0;
  }

  .nav-text { display: none !important; }
  .nav-link.active::before { display: none; }
  .nav-link i { font-size: 17px; margin: 0; }

  .main-shell { margin-left: 88px; }
}

@media (max-width: 767px) {
  .mobile-topbar { display: flex; }

  body { padding-top: 64px; }

  .side-nav {
    width: 280px;
    transform: translateX(-100%);
    box-shadow: 20px 0 60px rgba(0,0,0,0.5);
  }

  body.nav-open .side-nav {
    transform: translateX(0);
  }

  .nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(1,3,8,0.68);
    backdrop-filter: blur(4px);
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }

  body.nav-open .nav-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-brand-main {
    font-size: 17px;
  }

  body.nav-open { overflow: hidden; }

  .main-shell { margin-left: 0; }

  .page-hero {
    min-height: 62vh;
    padding: 52px 0;
  }

  .section {
    padding: 46px 0 16px;
  }

  .section-head {
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
  }

  .help-block {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px 0;
  }

  .help-figure { aspect-ratio: 16 / 10; }

  .help-figure:last-child {
    order: 2;
  }

  .flow-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .flow-card {
    padding: 20px;
  }

  .faq-answer {
    padding-left: 20px;
    padding-right: 20px;
    padding-bottom: 18px;
    font-size: 14px;
  }

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

  .footer-copyright {
    justify-content: center;
    text-align: center;
  }

  .footer-legal {
    align-items: center;
    flex-direction: column;
    gap: 4px;
  }

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

  .btn {
    width: 100%;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 34px; }
  .help-block { gap: 16px; }
  .page-hero { padding: 36px 0; }
  .container-x { padding-inline: 16px; }
}