/* roulang page: index */
:root{
  --bg:#070E14;
  --bg-soft:#0E1A22;
  --glass:rgba(20,34,44,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --ice:#17D2C2;
  --ice-deep:#0E9E93;
  --ember:#FF6A2B;
  --frost:#EAF4F7;
  --mist:#9BB0BC;
  --dim:#6B808C;
  --radius-card:16px;
  --radius-panel:22px;
  --radius-btn:11px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --ease:cubic-bezier(.16,1,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--frost);
  font-family:system-ui,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;line-height:1.8;
  background-image:
    repeating-linear-gradient(112deg,rgba(255,255,255,.028) 0 1px,transparent 1px 46px),
    radial-gradient(900px 520px at 78% -8%,rgba(23,210,194,.10),transparent 62%),
    radial-gradient(680px 420px at -6% 22%,rgba(255,106,43,.07),transparent 60%);
  background-attachment:fixed,fixed,fixed;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.22;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--ice);outline-offset:3px;border-radius:6px}
::selection{background:rgba(23,210,194,.28)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0a141b}
::-webkit-scrollbar-thumb{background:rgba(23,210,194,.32);border-radius:20px}
::-webkit-scrollbar-thumb:hover{background:rgba(23,210,194,.5)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 16px}
@media(min-width:640px){.container{padding:0 24px}}
@media(min-width:1280px){.container{padding:0 32px}}
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:104px 0}}
.num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,14,20,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease);
}
.nav-inner{height:64px;display:flex;align-items:center;gap:18px;transition:height .22s var(--ease)}
.site-header.compact .nav-inner{height:56px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:34px;height:34px;border-radius:50%;flex:none;
  background:radial-gradient(circle at 32% 28%,#e9fffb 0 18%,var(--ice) 42%,var(--ice-deep) 100%);
  box-shadow:0 0 0 1px rgba(23,210,194,.45),0 8px 20px -8px rgba(23,210,194,.7);
  position:relative;
}
.brand-mark::after{content:"";position:absolute;inset:9px;border-radius:50%;border:1.5px solid rgba(7,14,20,.55)}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-name em{color:var(--ice);font-style:normal}
.nav-links{display:none;align-items:center;gap:4px;margin-left:6px}
@media(min-width:1024px){.nav-links{display:flex}}
.nav-links a{
  position:relative;padding:9px 13px;border-radius:9px;font-size:15px;color:var(--mist);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover{color:var(--frost);background:rgba(255,255,255,.05)}
.nav-links a.active{color:var(--frost)}
.nav-links a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:var(--ice);box-shadow:0 0 10px rgba(23,210,194,.9);
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-search{display:none;align-items:center;gap:8px;padding:0 12px;height:40px;border-radius:var(--radius-btn);
  background:rgba(255,255,255,.04);border:1px solid var(--line);transition:border-color .2s var(--ease)}
@media(min-width:1024px){.nav-search{display:flex}}
.nav-search:focus-within{border-color:rgba(23,210,194,.7);box-shadow:0 0 0 3px rgba(23,210,194,.14)}
.nav-search i{color:var(--dim);font-size:13px}
.nav-search input{width:150px;background:transparent;border:0;outline:none;font-size:14px;color:var(--frost)}
.nav-search input::placeholder{color:var(--dim)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(180deg,#ff8046,var(--ember));color:#170c05;
  box-shadow:0 0 0 1px rgba(255,106,43,.5),0 12px 32px -10px rgba(255,106,43,.55);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,106,43,.65),0 18px 42px -12px rgba(255,106,43,.8);filter:brightness(1.06)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:rgba(255,255,255,.02);border-color:var(--line-strong);color:var(--frost)}
.btn-ghost:hover{border-color:rgba(23,210,194,.65);color:#fff;box-shadow:0 0 0 1px rgba(23,210,194,.22)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{display:inline-flex;align-items:center;gap:8px;color:var(--ice);font-size:15px;font-weight:600;min-height:44px}
.btn-text i{transition:transform .22s var(--ease)}
.btn-text:hover i{transform:translateX(4px)}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.hamburger{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-btn);border:1px solid var(--line);background:rgba(255,255,255,.03);cursor:pointer;
}
@media(min-width:1024px){.hamburger{display:none}}
.drawer{
  display:none;border-top:1px solid var(--line);background:rgba(7,14,20,.98);
}
.drawer.open{display:block}
.drawer nav{padding:12px 0 20px;display:flex;flex-direction:column}
.drawer a{
  padding:13px 14px;border-radius:10px;font-size:16px;color:var(--mist);
  border-left:2px solid transparent;
}
.drawer a:hover{background:rgba(255,255,255,.05);color:var(--frost)}
.drawer a.active{color:var(--frost);border-left-color:var(--ice);background:rgba(23,210,194,.08)}
.drawer-cta{margin:10px 0 0;display:flex;gap:10px}

/* ---------- glass / cards ---------- */
.glass{
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.card{
  position:relative;overflow:hidden;display:flex;flex-direction:column;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(23,210,194,.3);box-shadow:0 24px 50px -26px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.08)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;flex:none;background:#0b161d}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,14,20,0) 38%,rgba(7,14,20,.78) 100%)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:rgba(23,210,194,.12);color:var(--ice);border:1px solid rgba(23,210,194,.24);
}
.badge-ember{background:rgba(255,106,43,.12);color:#ffb08a;border-color:rgba(255,106,43,.3)}
.badge-mute{background:rgba(255,255,255,.05);color:var(--mist);border-color:var(--line)}
.badge-abs{position:absolute;top:14px;left:14px;z-index:2}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.meta-row{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--dim);margin-top:auto}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:var(--dim);flex:none}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:44px 0 56px}
@media(min-width:1024px){.hero{padding:64px 0 96px}}
.hero-ring{
  position:absolute;left:50%;top:34%;width:720px;height:720px;transform:translate(-50%,-50%);
  border-radius:50%;border:1px solid rgba(23,210,194,.13);
  box-shadow:inset 0 0 120px rgba(23,210,194,.06);pointer-events:none;
}
.hero-ring::before{content:"";position:absolute;inset:96px;border-radius:50%;border:1px dashed rgba(255,255,255,.07)}
.hero-grid{position:relative;display:grid;gap:34px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:5fr 7fr;gap:56px}}
.hero-eyebrow{display:inline-flex;align-items:center;gap:9px;padding:6px 14px;border-radius:999px;
  background:rgba(23,210,194,.1);border:1px solid rgba(23,210,194,.26);color:var(--ice);font-size:13px;font-weight:600}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--ice);box-shadow:0 0 0 0 rgba(23,210,194,.7);animation:pulse 2.2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(23,210,194,.6)}70%{box-shadow:0 0 0 12px rgba(23,210,194,0)}100%{box-shadow:0 0 0 0 rgba(23,210,194,0)}}
.hero h1{font-size:32px;margin:18px 0 0}
@media(min-width:768px){.hero h1{font-size:44px}}
@media(min-width:1024px){.hero h1{font-size:54px;line-height:1.1}}
.hero h1 span{color:var(--ice);display:block;font-size:.72em;margin-top:8px;letter-spacing:.01em}
.hero-sub{margin-top:16px;color:var(--mist);font-size:16.5px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:30px;max-width:520px}
.stat{padding:12px 14px;border-radius:13px;background:rgba(255,255,255,.035);border:1px solid var(--line)}
.stat b{display:block;font-size:19px;color:var(--frost)}
.stat span{font-size:12.5px;color:var(--dim)}
.hero-visual{position:relative}
.hero-shot{
  position:relative;border-radius:var(--radius-panel);overflow:hidden;border:1px solid var(--line-strong);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.95);
}
.hero-shot img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-shot::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(7,14,20,.55) 0%,rgba(7,14,20,.1) 46%,rgba(7,14,20,.72) 100%)}
.hero-strip{
  position:absolute;left:0;right:0;top:22px;height:2px;
  background:linear-gradient(90deg,transparent,rgba(23,210,194,.9),transparent);filter:blur(.3px);
}
.hero-float{
  position:absolute;right:14px;bottom:-18px;width:min(300px,86%);
  padding:18px;border-radius:var(--radius-card);
  background:rgba(14,26,34,.86);backdrop-filter:blur(16px);
  border:1px solid rgba(23,210,194,.28);box-shadow:0 24px 50px -24px rgba(0,0,0,.95);
}
@media(min-width:768px){.hero-float{right:-16px;bottom:24px}}
.hero-float .label{font-size:12.5px;color:var(--dim)}
.hero-float .value{font-size:30px;color:var(--frost);line-height:1.1;margin-top:4px}
.hero-float .value small{font-size:13px;color:var(--mist);margin-left:6px}

/* ---------- section heading ---------- */
.sec-head{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;justify-content:space-between;margin-bottom:34px}
.sec-head h2{font-size:25px}
@media(min-width:1024px){.sec-head h2{font-size:33px}}
.sec-head p{color:var(--mist);font-size:15.5px;margin-top:10px;max-width:640px}
.kicker{display:inline-flex;align-items:center;gap:8px;color:var(--ice);font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase}
.kicker::before{content:"";width:22px;height:1px;background:var(--ice)}

/* ---------- steps ---------- */
.steps{display:grid;gap:20px}
.step{
  position:relative;padding:24px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.step:hover{border-color:rgba(23,210,194,.3);transform:translateY(-3px)}
.step-wide{display:grid;gap:22px;align-items:center;padding:22px}
@media(min-width:768px){.step-wide{grid-template-columns:1.05fr .95fr;gap:30px}}
.step-wide img{border-radius:14px;border:1px solid var(--line-strong);aspect-ratio:16/10;object-fit:cover;width:100%}
.puck{
  width:42px;height:42px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#04191c;
  background:radial-gradient(circle at 34% 30%,#c9fffa,var(--ice) 58%,var(--ice-deep));
  box-shadow:0 0 0 1px rgba(23,210,194,.5),0 10px 24px -12px rgba(23,210,194,.9);
}
.step h3{font-size:19px;margin-top:16px}
.step p{color:var(--mist);font-size:15.5px;margin-top:9px}
.trail{position:relative;margin-top:18px;height:20px}
.trail svg{width:100%;height:20px;overflow:visible}
.trail path{stroke:rgba(23,210,194,.4);stroke-width:1.5;fill:none;stroke-dasharray:5 7}

/* ---------- rewards ---------- */
.rail-wrap{position:relative}
.rail{display:grid;grid-auto-flow:column;grid-auto-columns:78%;gap:16px;overflow-x:auto;padding:6px 4px 18px;scroll-snap-type:x mandatory}
@media(min-width:640px){.rail{grid-auto-columns:46%}}
@media(min-width:1024px){.rail{grid-auto-flow:row;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-columns:auto;overflow:visible;padding-bottom:0}}
.rail::-webkit-scrollbar{height:6px}
.reward{
  scroll-snap-align:start;padding:22px;border-radius:var(--radius-card);
  background:linear-gradient(180deg,rgba(23,210,194,.08),rgba(20,34,44,.55) 42%);
  border:1px solid var(--line);box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.reward:hover{border-color:rgba(23,210,194,.34);transform:translateY(-3px)}
.reward-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.reward .amount{font-size:32px;color:var(--frost);margin-top:16px;line-height:1.1}
.reward .amount small{font-size:13px;color:var(--mist);margin-left:4px}
.reward p{font-size:14px;color:var(--mist);margin-top:10px;min-height:44px}
.ring{
  width:54px;height:54px;border-radius:50%;flex:none;position:relative;
  background:conic-gradient(var(--ice) calc(var(--p) * 1%),rgba(255,255,255,.09) 0);
}
.ring::after{
  content:attr(data-p);position:absolute;inset:5px;border-radius:50%;background:#0b161d;
  display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--mist);
  font-family:ui-monospace,Menlo,Consolas,monospace;
}

/* ---------- tasks ---------- */
.tasks{display:grid;gap:12px}
.task{
  display:grid;gap:12px;padding:18px 20px;border-radius:14px;
  background:rgba(255,255,255,.032);border:1px solid var(--line);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
@media(min-width:768px){.task{grid-template-columns:1.2fr 92px 1.6fr 62px;align-items:center;gap:18px}}
.task:hover{border-color:rgba(23,210,194,.26);background:rgba(23,210,194,.045)}
.task-name{font-size:15.5px;font-weight:600}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden}
.bar i{
  display:block;height:100%;width:var(--w);border-radius:999px;transform-origin:left;
  background:linear-gradient(90deg,var(--ice),var(--ember));
  animation:grow .9s var(--ease) both;
}
@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.pct{font-size:14px;color:var(--mist);text-align:right}

/* ---------- info list ---------- */
.post-grid{display:grid;gap:20px}
@media(min-width:640px){.post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.post-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.empty{
  padding:46px 24px;text-align:center;border-radius:var(--radius-card);
  border:1px dashed var(--line-strong);background:rgba(255,255,255,.02);
}
.empty i{font-size:26px;color:var(--ice)}
.empty p{color:var(--mist);margin:14px 0 18px}

/* ---------- proof ---------- */
.proof{display:grid;gap:20px}
@media(min-width:1024px){.proof{grid-template-columns:1.15fr .85fr;gap:24px}}
.proof-board{padding:26px;border-radius:var(--radius-panel);position:relative;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-card)}
.board-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:20px}
@media(min-width:640px){.board-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.board-cell{padding:16px;border-radius:13px;background:rgba(255,255,255,.035);border:1px solid var(--line)}
.board-cell b{display:block;font-size:24px;color:var(--ice)}
.board-cell span{font-size:12.5px;color:var(--dim)}
.quotes{display:grid;gap:16px}
.quote{padding:20px;border-radius:14px;background:rgba(255,255,255,.032);border:1px solid var(--line);border-left:3px solid var(--ice)}
.quote p{font-size:15px;color:var(--mist)}
.quote span{display:block;margin-top:12px;font-size:13px;color:var(--dim)}

/* ---------- faq ---------- */
.faq{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq details{
  border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.03);
  overflow:hidden;transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq details[open]{border-color:rgba(23,210,194,.32);background:rgba(23,210,194,.05)}
.faq summary{
  cursor:pointer;list-style:none;padding:18px 52px 18px 20px;position:relative;
  font-size:16px;font-weight:600;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  color:var(--ice);font-size:22px;line-height:1;transition:transform .22s var(--ease);
}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq .answer{padding:0 20px 20px;color:var(--mist);font-size:15.5px}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-panel);
  border:1px solid var(--line-strong);
  background-image:linear-gradient(90deg,rgba(7,14,20,.94) 12%,rgba(7,14,20,.62) 62%,rgba(7,14,20,.35)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
}
.cta-inner{position:relative;display:grid;gap:22px;padding:36px 24px;align-items:center}
@media(min-width:768px){.cta-inner{grid-template-columns:1.4fr auto;padding:48px 40px}}
.cta-inner h2{font-size:26px}
@media(min-width:1024px){.cta-inner h2{font-size:34px}}
.cta-inner p{color:var(--mist);margin-top:12px;max-width:520px}
.arc{position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;border:1px solid rgba(23,210,194,.22);pointer-events:none}
.arc::after{content:"";position:absolute;inset:44px;border-radius:50%;border:1px dashed rgba(255,255,255,.09)}

/* ---------- footer ---------- */
.site-footer{margin-top:24px;border-top:1px solid var(--line);background:rgba(7,14,20,.72)}
.foot-grid{display:grid;gap:28px;padding:52px 0 30px}
@media(min-width:768px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}}
.foot-title{font-size:13px;letter-spacing:.1em;color:var(--dim);text-transform:uppercase;margin-bottom:14px;font-weight:600}
.foot-list{display:grid;gap:10px}
.foot-list a{color:var(--mist);font-size:14.5px;transition:color .2s var(--ease)}
.foot-list a:hover{color:var(--ice)}
.foot-note{color:var(--dim);font-size:13.5px;line-height:1.9}
.foot-bottom{border-top:1px solid var(--line);padding:18px 0 26px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;color:var(--dim);font-size:13px}
.to-top{
  position:fixed;right:18px;bottom:22px;z-index:70;width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  background:rgba(14,26,34,.82);backdrop-filter:blur(12px);border:1px solid rgba(23,210,194,.32);
  color:var(--ice);opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{box-shadow:0 0 0 1px rgba(23,210,194,.5),0 12px 26px -12px rgba(23,210,194,.8)}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --bg:#070E14;
  --panel:#0E1A22;
  --glass:rgba(20,34,44,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.10);
  --cyan:#17D2C2;
  --cyan-dark:#0E9E93;
  --orange:#FF6A2B;
  --text:#EAF4F7;
  --muted:#9BB0BC;
  --faint:#6B808C;
  --radius-card:16px;
  --radius-lg:22px;
  --radius-btn:11px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --ease:cubic-bezier(.16,1,.3,1);
}

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

html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    repeating-linear-gradient(115deg, rgba(255,255,255,.05) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(115deg, rgba(23,210,194,.04) 0 1px, transparent 1px 200px);
  opacity:.55;
}

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

a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}

button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}

input{font:inherit}

ul,ol{margin:0;padding:0}

h1,h2,h3,h4{font-weight:700;letter-spacing:-.01em}

body .container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 16px;
  position:relative;
}
@media (min-width:640px){ body .container{padding:0 24px} }
@media (min-width:1280px){ body .container{padding:0 32px} }

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

.skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--cyan);color:#06131A;padding:10px 16px;border-radius:0 0 10px 0;font-weight:600;
}
.skip:focus{left:0}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:6px;
}

/* ============ 导航 ============ */
.site-head{
  position:sticky;top:0;z-index:80;
  background:rgba(7,14,20,.84);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}

.head-inner{
  display:flex;
  align-items:center;
  gap:18px;
  height:64px;
}

.brand{display:inline-flex;align-items:center;gap:10px;flex:none}

.brand-mark{
  width:26px;height:26px;border-radius:50%;flex:none;
  background:radial-gradient(circle at 32% 28%, #ffffff, var(--cyan) 45%, var(--cyan-dark) 78%);
  box-shadow:0 0 0 4px rgba(23,210,194,.12), 0 0 18px rgba(23,210,194,.35);
}

.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-name em{font-style:normal;color:var(--cyan)}

.nav-links{display:none;align-items:center;gap:4px;margin-right:auto}
@media (min-width:1024px){ .nav-links{display:flex} }

.nav-links a{
  position:relative;
  padding:8px 13px;
  border-radius:10px;
  font-size:14.5px;
  color:var(--muted);
  white-space:nowrap;
  transition:color .22s var(--ease), background .22s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(23,210,194,.85);
}

.head-actions{display:flex;align-items:center;gap:10px;margin-left:auto}

.head-search{
  display:none;align-items:center;gap:8px;height:38px;padding:0 12px;
  border:1px solid var(--line-strong);border-radius:10px;background:rgba(255,255,255,.03);
  transition:border-color .22s var(--ease), box-shadow .22s var(--ease);
}
@media (min-width:1024px){ .head-search{display:flex} }
.head-search:focus-within{border-color:rgba(23,210,194,.7);box-shadow:0 0 0 3px rgba(23,210,194,.12)}
.head-search svg{width:15px;height:15px;color:var(--faint);flex:none}
.head-search input{
  width:136px;background:transparent;border:0;outline:none;color:var(--text);font-size:14px;padding:0;
}
.head-search input::placeholder{color:var(--faint)}

.nav-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 11px;border-radius:10px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  transition:border-color .22s var(--ease);
}
.nav-toggle:hover{border-color:rgba(23,210,194,.5)}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (min-width:1024px){ .nav-toggle{display:none} }

.drawer{display:none;border-top:1px solid var(--line);background:rgba(7,14,20,.96)}
.drawer.open{display:block}
.drawer nav{display:flex;flex-direction:column;padding:6px 0 14px}
.drawer a{
  display:block;padding:13px 4px 13px 14px;font-size:15px;color:var(--muted);
  border-left:2px solid transparent;
}
.drawer a:hover,.drawer a.active{color:var(--text);border-left-color:var(--cyan);background:rgba(23,210,194,.06)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease), color .22s var(--ease);
}
.btn-primary{
  color:#0A1418;
  background:linear-gradient(180deg,#FF8A52 0%,#FF6A2B 100%);
  box-shadow:0 0 0 1px rgba(255,106,43,.5), 0 12px 32px -10px rgba(255,106,43,.55);
}
.btn-primary:hover{
  color:#0A1418;transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(255,106,43,.75), 0 18px 40px -10px rgba(255,106,43,.7);
}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--text);
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.03);
}
.btn-ghost:hover{
  color:var(--text);border-color:rgba(23,210,194,.7);
  box-shadow:0 0 0 3px rgba(23,210,194,.12);
}
.btn-sm{min-height:38px;padding:0 15px;font-size:14px;border-radius:10px}
.btn-text{min-height:auto;padding:0;color:var(--cyan);font-size:14.5px;font-weight:600}
.btn-text:hover{color:#5BE9DC}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--cyan);background:rgba(23,210,194,.12);
  border:1px solid rgba(23,210,194,.25);
}
.badge-warm{color:#FFB08A;background:rgba(255,106,43,.13);border-color:rgba(255,106,43,.28)}

/* ============ 文章头 ============ */
.page-hero{position:relative;padding:38px 0 10px;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;left:0;right:0;top:-150px;height:460px;pointer-events:none;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.20;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 88%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 88%);
}
.page-hero::after{
  content:"";position:absolute;left:50%;top:-170px;width:640px;height:640px;transform:translateX(-50%);
  border:1px solid rgba(23,210,194,.10);border-radius:50%;pointer-events:none;
}

.crumb{
  position:relative;z-index:2;
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--faint);margin-bottom:16px;
}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--cyan)}
.crumb .sep{color:rgba(255,255,255,.22)}
.crumb .cur{color:var(--faint)}

.hero-card{position:relative;z-index:2;max-width:920px}
.hero-card h1{
  margin:16px 0 16px;
  font-size:30px;line-height:1.24;font-weight:700;
}
@media (min-width:768px){ .hero-card h1{font-size:40px} }
@media (min-width:1024px){ .hero-card h1{font-size:48px;line-height:1.16} }

.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13.5px;color:var(--faint);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--faint);opacity:.55}
.meta-row .mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.02em}

.hero-rule{
  position:relative;z-index:2;
  margin-top:26px;height:1px;
  background:linear-gradient(90deg, rgba(23,210,194,.55), rgba(255,106,43,.28), transparent);
}

/* ============ 正文排版 ============ */
.article-wrap{padding:44px 0 8px}
@media (min-width:1024px){ .article-wrap{padding:56px 0 8px} }

.article-grid{display:grid;gap:34px}
@media (min-width:1024px){
  .article-grid{grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:44px;align-items:start}
}

.article-main{min-width:0}

.prose-ice{
  max-width:780px;
  font-size:17px;
  line-height:1.9;
  color:#D5E3E9;
}
@media (min-width:768px){ .prose-ice{font-size:17.5px} }

.prose-ice > *:first-child{margin-top:0}
.prose-ice p{margin:0 0 1.2em}
.prose-ice strong{color:var(--text);font-weight:700}
.prose-ice em{color:var(--cyan);font-style:normal}

.prose-ice h2{
  position:relative;
  margin:2.2em 0 .8em;
  padding-left:15px;
  font-size:23px;line-height:1.35;font-weight:700;color:var(--text);
}
@media (min-width:768px){ .prose-ice h2{font-size:26px} }
.prose-ice h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:3px;
  background:var(--cyan);box-shadow:0 0 12px rgba(23,210,194,.7);
}

.prose-ice h3{margin:1.6em 0 .6em;font-size:20px;line-height:1.45;font-weight:600;color:var(--text)}
.prose-ice h4{margin:1.4em 0 .5em;font-size:17.5px;font-weight:600;color:var(--muted)}

.prose-ice ul,.prose-ice ol{margin:0 0 1.2em;padding-left:1.35em}
.prose-ice li{margin:.42em 0}
.prose-ice li::marker{color:var(--cyan)}
.prose-ice ul li::marker{font-size:1.05em}

.prose-ice blockquote{
  margin:1.5em 0;padding:15px 20px;
  border-left:3px solid var(--cyan);
  background:rgba(23,210,194,.06);
  border-radius:0 12px 12px 0;
  color:var(--muted);
}
.prose-ice blockquote p:last-child{margin-bottom:0}

.prose-ice img{
  border-radius:12px;border:1px solid var(--line-strong);
  margin:1.5em 0;
}

.prose-ice a{
  color:var(--cyan);
  border-bottom:1px solid rgba(23,210,194,.35);
}
.prose-ice a:hover{border-bottom-color:var(--cyan)}

.prose-ice code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.9em;
  background:rgba(255,255,255,.07);
  padding:2px 6px;border-radius:6px;color:#9FE9E0;
}
.prose-ice pre{
  background:#050B10;border:1px solid var(--line-strong);border-radius:12px;
  padding:16px;overflow:auto;margin:1.5em 0;
}
.prose-ice pre code{background:none;padding:0;color:#CFE6EA}

.prose-ice table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px}
.prose-ice th,.prose-ice td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.prose-ice th{color:var(--text);background:rgba(255,255,255,.04);font-weight:600}
.prose-ice tbody tr:nth-child(even){background:rgba(255,255,255,.02)}

.prose-ice hr{border:0;height:1px;background:var(--line);margin:2.2em 0}

.empty-state{
  padding:44px 24px;text-align:center;
  border:1px dashed rgba(255,255,255,.14);
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,.02);
}
.empty-icon{
  width:54px;height:54px;margin:0 auto 16px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(23,210,194,.10);border:1px solid rgba(23,210,194,.25);
  color:var(--cyan);font-size:22px;
}
.empty-title{margin:0 0 6px;font-size:19px;font-weight:700;color:var(--text)}
.empty-text{margin:0 0 20px;font-size:14.5px;color:var(--muted)}

/* ============ 侧栏 ============ */
.article-side{display:flex;flex-direction:column;gap:20px;min-width:0}
@media (min-width:1024px){ .side-sticky{position:sticky;top:86px} }

.side-card{
  background:var(--glass);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
}

.side-title{
  display:flex;align-items:center;gap:9px;
  margin:0 0 14px;font-size:15px;font-weight:700;color:var(--text);
}
.side-title::before{
  content:"";width:3px;height:14px;border-radius:3px;background:var(--cyan);
  box-shadow:0 0 10px rgba(23,210,194,.7);
}

.side-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.side-list a{
  display:flex;flex-direction:column;gap:3px;
  padding:2px 0 2px 12px;
  border-left:2px solid rgba(255,255,255,.08);
  transition:border-color .22s var(--ease), transform .22s var(--ease);
}
.side-list a:hover{border-left-color:var(--cyan);transform:translateX(2px)}
.side-list span{font-size:14.5px;font-weight:600;color:var(--text)}
.side-list em{font-style:normal;font-size:12.5px;color:var(--faint)}

.hot-list{list-style:none;counter-reset:hot}
.hot-list li{
  counter-increment:hot;
  display:flex;gap:11px;align-items:flex-start;
  padding:10px 0;border-bottom:1px dashed var(--line);
}
.hot-list li:last-child{border-bottom:0;padding-bottom:0}
.hot-list li::before{
  content:counter(hot,decimal-leading-zero);
  font-family:ui-monospace,Menlo,Consolas,monospace;
  font-size:12px;letter-spacing:.04em;
  color:var(--cyan);opacity:.85;padding-top:3px;flex:none;
}
.hot-list a{font-size:14px;color:var(--muted);line-height:1.65}
.hot-list a:hover{color:var(--text)}

.side-note{font-size:12.5px;color:var(--faint);line-height:1.8;margin:12px 0 0}

/* ============ 相关推荐 ============ */
.related-sec{padding:64px 0 0}
@media (min-width:1024px){ .related-sec{padding:88px 0 0} }

.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.sec-head h2{margin:0;font-size:24px;line-height:1.3;font-weight:700}
@media (min-width:768px){ .sec-head h2{font-size:30px} }
.sec-head p{margin:6px 0 0;font-size:14px;color:var(--faint)}

.related-grid{display:grid;gap:20px}
@media (min-width:640px){ .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (min-width:1024px){ .related-grid{grid-template-columns:repeat(3,minmax(0,1fr))} }

.card{
  position:relative;
  display:block;
  background:var(--glass);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
  overflow:hidden;
  transition:transform .24s var(--ease), border-color .24s var(--ease);
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;z-index:2;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
}
.card:hover{transform:translateY(-3px);border-color:rgba(23,210,194,.35)}

.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0B1620}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,14,20,.05),rgba(7,14,20,.62));
}
.card-media .badge{position:absolute;left:14px;top:14px;z-index:2}

.card-body{padding:18px 20px 20px}
.card-body h3{
  margin:0 0 8px;font-size:17px;line-height:1.5;font-weight:700;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-body p{
  margin:0 0 14px;font-size:14px;line-height:1.75;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--faint)}
.card-meta .mono{font-family:ui-monospace,Menlo,Consolas,monospace;letter-spacing:.02em}

/* ============ 底部 CTA ============ */
.cta-strip{position:relative;margin-top:72px;overflow:hidden}
@media (min-width:1024px){ .cta-strip{margin-top:100px} }

.cta-inner{
  position:relative;
  display:flex;flex-direction:column;gap:22px;
  padding:34px 26px;
  border-radius:var(--radius-lg);
  border:1px solid rgba(255,106,43,.28);
  background:linear-gradient(120deg, rgba(255,106,43,.14), rgba(20,34,44,.72) 46%, rgba(23,210,194,.12));
  box-shadow:0 24px 60px -34px rgba(0,0,0,.9);
  overflow:hidden;
}
@media (min-width:768px){ .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 38px} }

.cta-inner::after{
  content:"";position:absolute;right:-90px;bottom:-130px;width:340px;height:340px;border-radius:50%;
  border:1px solid rgba(23,210,194,.18);pointer-events:none;
}
.cta-inner h2{margin:0 0 8px;font-size:22px;line-height:1.35;font-weight:700}
@media (min-width:768px){ .cta-inner h2{font-size:27px} }
.cta-inner p{margin:0;font-size:14.5px;color:var(--muted);max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:80px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(14,26,34,.55), rgba(7,14,20,.95));
}
@media (min-width:1024px){ .site-footer{margin-top:110px} }

.foot-grid{
  display:grid;gap:30px;
  padding:52px 0 34px;
}
@media (min-width:640px){ .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (min-width:1024px){ .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:34px} }

.foot-title{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--text);margin-bottom:14px}
.foot-list{display:flex;flex-direction:column;gap:10px}
.foot-list a{font-size:14px;color:var(--muted)}
.foot-list a:hover{color:var(--cyan)}
.foot-note{margin:0;font-size:13.5px;line-height:1.85;color:var(--faint)}

.foot-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding:18px 0 26px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--faint);
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:18px;bottom:22px;z-index:90;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,34,44,.72);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
  color:var(--muted);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s var(--ease), transform .24s var(--ease), visibility .24s var(--ease), border-color .24s var(--ease), color .24s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--cyan);border-color:rgba(23,210,194,.55)}
.to-top svg{width:18px;height:18px}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --bg:#070E14;
  --bg-2:#0E1A22;
  --bg-3:#132530;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --ice:#17D2C2;
  --ice-deep:#0E9E93;
  --ice-soft:rgba(23,210,194,.12);
  --burst:#FF6A2B;
  --burst-soft:rgba(255,106,43,.14);
  --text:#EAF4F7;
  --text-2:#9BB0BC;
  --text-3:#6B808C;
  --r-card:16px;
  --r-btn:12px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --glow-burst:0 0 0 1px rgba(255,106,43,.5), 0 12px 32px -10px rgba(255,106,43,.55);
  --ease:cubic-bezier(.16,1,.3,1);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.035) 0 1px,transparent 1px 46px);
  opacity:.7;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--ice);outline-offset:3px;border-radius:6px}
::selection{background:rgba(23,210,194,.28);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#080F15}
::-webkit-scrollbar-thumb{background:rgba(23,210,194,.28);border-radius:999px;border:2px solid #080F15}
::-webkit-scrollbar-thumb:hover{background:rgba(23,210,194,.45)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 16px;position:relative;z-index:1}
@media (min-width:640px){.container{padding:0 24px}}
@media (min-width:1280px){.container{padding:0 32px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,14,20,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:64px;transition:height .22s var(--ease);
}
body.scrolled .header-inner{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:30px;height:30px;border-radius:50%;flex-shrink:0;
  background:radial-gradient(circle at 32% 30%,#ffffff 0 8%,var(--ice) 34%,#0B5860 100%);
  box-shadow:0 0 0 1px rgba(23,210,194,.45),0 0 18px -4px rgba(23,210,194,.75);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  border:2px solid rgba(7,14,20,.65);
  border-top-color:transparent;border-left-color:transparent;
  transform:rotate(-24deg);
}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text);white-space:nowrap}
.brand-name em{font-style:normal;color:var(--ice);font-weight:600;margin-left:1px}
.header-right{display:flex;align-items:center;gap:14px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{
  position:relative;font-size:14.5px;color:var(--text-2);padding:6px 2px;
  transition:color .2s var(--ease);white-space:nowrap;
}
.nav-links a:hover{color:var(--text)}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--ice);opacity:0;transform:scaleX(.4);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.nav-links a:hover::after{opacity:.45;transform:scaleX(1)}
.nav-links a.active{color:var(--text);font-weight:600}
.nav-links a.active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 12px rgba(23,210,194,.8)}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(20,34,44,.6);border:1px solid var(--line);border-radius:999px;
  padding:7px 14px;min-width:168px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search:focus-within{border-color:rgba(23,210,194,.55);box-shadow:0 0 0 3px rgba(23,210,194,.12)}
.nav-search svg{width:15px;height:15px;flex-shrink:0;color:var(--text-3)}
.nav-search input{
  background:none;border:0;outline:none;color:var(--text);font-size:13.5px;width:100%;
}
.nav-search input::placeholder{color:var(--text-3)}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:rgba(20,34,44,.6);color:var(--text);
}
.nav-toggle svg{width:20px;height:20px}
.nav-drawer{
  display:none;position:absolute;left:0;right:0;top:100%;
  background:rgba(9,17,24,.985);border-bottom:1px solid var(--line);
  backdrop-filter:blur(16px);padding:10px 16px 20px;
}
.nav-drawer.open{display:block}
.nav-drawer a{
  display:block;padding:13px 0 13px 14px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--line);border-left:2px solid transparent;
}
.nav-drawer a.active{color:var(--text);font-weight:600;border-left-color:var(--ice);background:rgba(23,210,194,.06)}
.nav-drawer .drawer-cta{margin-top:16px;border:0;padding:0}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{
  background:linear-gradient(180deg,#FF8248,#F1531A);
  color:#1A0C04;box-shadow:var(--glow-burst);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,106,43,.7),0 18px 40px -10px rgba(255,106,43,.75)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:rgba(255,255,255,.03);color:var(--text);border:1px solid var(--line-2);
}
.btn-ghost:hover{border-color:rgba(23,210,194,.6);color:var(--ice);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:13.5px}
.btn-block{width:100%}

/* ---------- Shared bits ---------- */
.glass{
  background:rgba(20,34,44,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:999px;padding:4px 12px;font-size:12.5px;font-weight:600;
  background:var(--ice-soft);color:var(--ice);border:1px solid rgba(23,210,194,.22);
}
.badge-warm{background:var(--burst-soft);color:#FFA275;border-color:rgba(255,106,43,.28)}
.badge-mute{background:rgba(255,255,255,.05);color:var(--text-3);border-color:var(--line)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:26px;line-height:1.25;font-weight:700;letter-spacing:.01em}
@media (min-width:1024px){.section-head h2{font-size:34px}}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  color:var(--ice);letter-spacing:.14em;text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--ice);box-shadow:0 0 10px rgba(23,210,194,.9)}
.divider{height:1px;background:linear-gradient(90deg,transparent,rgba(23,210,194,.35),rgba(255,106,43,.28),transparent);border:0;margin:0}

/* ---------- KV ---------- */
.kv{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.kv-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.4;transform:scale(1.02)}
.kv-veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,14,20,.5) 0%,rgba(7,14,20,.78) 55%,rgba(7,14,20,.97) 100%);
}
.kv-ring{
  position:absolute;right:-90px;top:-70px;width:420px;height:420px;border-radius:50%;
  border:1px solid rgba(23,210,194,.14);pointer-events:none;
}
.kv-ring::after{
  content:"";position:absolute;inset:70px;border-radius:50%;border:1px dashed rgba(23,210,194,.12);
}
.kv-inner{position:relative;z-index:2;padding:64px 0 58px}
@media (min-width:1024px){.kv-inner{padding:96px 0 84px}}
.kv h1{
  font-size:30px;line-height:1.2;font-weight:700;letter-spacing:.01em;max-width:20em;
}
@media (min-width:1024px){.kv h1{font-size:52px;line-height:1.1}}
.kv-sub{margin-top:18px;color:var(--text-2);font-size:16px;max-width:36em}
.kv-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.kv-stats{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.kv-stat{
  display:flex;flex-direction:column;gap:2px;
  padding:14px 22px;border-radius:14px;
  background:rgba(20,34,44,.5);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  min-width:132px;
}
.kv-stat b{font-family:var(--mono);font-size:22px;font-weight:700;color:var(--ice);letter-spacing:.02em}
.kv-stat span{font-size:12.5px;color:var(--text-3)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px}
.breadcrumb a{color:var(--text-2);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--ice)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .cur{color:var(--text-3)}

/* ---------- Cards ---------- */
.card{
  background:rgba(20,34,44,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
  overflow:hidden;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{
  border-color:rgba(23,210,194,.3);
  transform:translateY(-3px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 26px 50px -26px rgba(0,0,0,.9);
}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0B1620}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);opacity:.9}
.card:hover .thumb img{transform:scale(1.04);opacity:1}
.thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,14,20,.05) 30%,rgba(7,14,20,.78) 100%);
}
.thumb .thumb-badge{position:absolute;left:14px;top:14px;z-index:2}
.card-body{padding:22px 22px 24px}
@media (min-width:1024px){.card-body{padding:24px 26px 26px}}
.card-body h3{font-size:19px;font-weight:700;line-height:1.45;margin-bottom:10px}
.card-body p{color:var(--text-2);font-size:14.5px;line-height:1.75}
.card-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}
.reward-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.tier{
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:#FFA275;
  background:var(--burst-soft);border:1px solid rgba(255,106,43,.28);
  border-radius:999px;padding:3px 11px;
}
.reward-num{
  font-family:var(--mono);font-size:30px;font-weight:700;color:var(--text);
  letter-spacing:.02em;line-height:1.1;
}
.reward-num small{font-size:12.5px;font-weight:500;color:var(--text-3);margin-left:8px;letter-spacing:0}
.reward-foot{margin-top:20px}

/* ---------- Timeline ---------- */
.timeline{position:relative;margin-top:8px}
.tl-item{position:relative;padding:2px 0 30px 40px}
.tl-item::before{
  content:"";position:absolute;left:7px;top:22px;bottom:-2px;width:2px;
  background:linear-gradient(180deg,rgba(23,210,194,.75),rgba(255,106,43,.35));
}
.tl-item:last-child::before{display:none}
.tl-item::after{
  content:"";position:absolute;left:0;top:8px;width:16px;height:16px;border-radius:50%;
  background:radial-gradient(circle at 35% 32%,#ffffff 0 10%,var(--ice) 45%,#0A5F66 100%);
  box-shadow:0 0 0 3px rgba(23,210,194,.14),0 0 16px -2px rgba(23,210,194,.7);
}
.tl-item h3{font-size:18px;font-weight:700;margin-bottom:8px}
.tl-item p{color:var(--text-2);font-size:14.8px;max-width:52em}
.tl-tag{display:inline-block;margin-left:10px;font-family:var(--mono);font-size:12px;color:var(--text-3)}

/* ---------- Task panel ---------- */
.task-panel{padding:24px 20px}
@media (min-width:640px){.task-panel{padding:30px 28px}}
.task-row{display:grid;grid-template-columns:1fr;gap:10px;padding:18px 0;border-bottom:1px solid var(--line)}
.task-row:last-child{border-bottom:0;padding-bottom:4px}
.task-row:first-child{padding-top:6px}
@media (min-width:768px){
  .task-row{grid-template-columns:180px 1fr 96px;align-items:center;gap:22px}
}
.task-name{display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:600}
.task-name .dot{width:7px;height:7px;border-radius:50%;background:var(--ice);box-shadow:0 0 10px rgba(23,210,194,.9);flex-shrink:0}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;position:relative}
.bar-fill{
  display:block;height:100%;width:0;border-radius:999px;
  background:linear-gradient(90deg,var(--ice),var(--burst));
  transition:width .8s var(--ease);
}
.task-pct{font-family:var(--mono);font-size:14.5px;color:var(--text-2);text-align:right}
.task-line{display:flex;align-items:center;gap:12px;margin-top:4px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:14px;background:rgba(20,34,44,.42);
  margin-bottom:14px;overflow:hidden;transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq-item[open]{border-color:rgba(23,210,194,.3);background:rgba(16,29,38,.85)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:15.5px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  position:relative;width:18px;height:18px;flex-shrink:0;color:var(--ice);
  transition:transform .24s var(--ease);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq-item summary .plus::before{left:0;right:0;top:8px;height:2px}
.faq-item summary .plus::after{top:0;bottom:0;left:8px;width:2px;transition:transform .24s var(--ease)}
.faq-item[open] summary .plus{transform:rotate(90deg)}
.faq-item[open] summary .plus::after{transform:scaleY(0)}
.faq-body{padding:0 22px 20px;color:var(--text-2);font-size:14.8px;line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:22px;
  border:1px solid rgba(23,210,194,.2);
  background:linear-gradient(120deg,rgba(23,210,194,.12),rgba(20,34,44,.7) 48%,rgba(255,106,43,.14));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07),var(--shadow-card);
  padding:38px 24px;
}
@media (min-width:1024px){.cta-band{padding:52px 48px}}
.cta-band h2{font-size:24px;font-weight:700;line-height:1.3;max-width:22em}
@media (min-width:1024px){.cta-band h2{font-size:32px}}
.cta-band p{margin-top:12px;color:var(--text-2);font-size:15.5px;max-width:40em}
.cta-arc{
  position:absolute;right:-60px;bottom:-120px;width:340px;height:340px;border-radius:50%;
  border:1px solid rgba(255,106,43,.22);pointer-events:none;
}
.cta-arc::after{
  content:"";position:absolute;inset:56px;border-radius:50%;border:1px dashed rgba(23,210,194,.18);
}
.cta-flex{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;position:relative;z-index:2}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:72px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(14,26,34,.6),rgba(7,14,20,1));
  position:relative;z-index:1;
}
.foot-grid{
  display:grid;grid-template-columns:1fr;gap:34px;padding:52px 0 40px;
}
@media (min-width:640px){.foot-grid{grid-template-columns:repeat(2,1fr);gap:32px}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding:64px 0 48px}}
.foot-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--text);margin-bottom:16px;text-transform:uppercase}
.foot-list{display:flex;flex-direction:column;gap:11px}
.foot-list a{font-size:14.5px;color:var(--text-2);transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-list a:hover{color:var(--ice);transform:translateX(2px)}
.foot-note{font-size:13.5px;line-height:1.85;color:var(--text-3);max-width:30em}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);padding:20px 0 26px;font-size:13px;color:var(--text-3);
}
.foot-bottom span{white-space:nowrap}

/* ---------- To top ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,34,44,.82);border:1px solid var(--line-2);color:var(--text);
  backdrop-filter:blur(12px);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:rgba(23,210,194,.6);color:var(--ice)}
.to-top svg{width:18px;height:18px}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --bg:#070E14;
  --bg-2:#0E1A22;
  --glass:rgba(20,34,44,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --ice:#17D2C2;
  --ice-dark:#0E9E93;
  --orange:#FF6A2B;
  --text:#EAF4F7;
  --muted:#9BB0BC;
  --dim:#6B808C;
  --r-card:16px;
  --r-lg:22px;
  --r-btn:11px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.8);
  --sh-glow:0 0 0 1px rgba(255,106,43,.5), 0 12px 32px -10px rgba(255,106,43,.55);
  --ease:cubic-bezier(.16,1,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:repeating-linear-gradient(115deg, rgba(255,255,255,.028) 0 1px, transparent 1px 9px);
  opacity:.6;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul{list-style:none;padding:0}
::selection{background:rgba(23,210,194,.32);color:#fff}
:focus-visible{outline:2px solid var(--ice);outline-offset:2px;border-radius:6px}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#070E14}
::-webkit-scrollbar-thumb{background:#1D303A;border-radius:8px;border:2px solid #070E14}
::-webkit-scrollbar-thumb:hover{background:#28414E}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 16px;
  position:relative;
  z-index:1;
}
@media (min-width:640px){ .container{padding:0 24px} }
@media (min-width:1280px){ .container{padding:0 32px} }

.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.02em}
.section{padding:64px 0}
@media (min-width:1024px){ .section{padding:96px 0} }
section[id]{scroll-margin-top:96px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,14,20,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:18px;
  height:64px;
  transition:height .24s var(--ease);
}
.site-header.compact .header-inner{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:26px;height:26px;border-radius:50%;
  background:radial-gradient(circle at 32% 28%, #EAF4F7 0%, #17D2C2 46%, #0B1720 100%);
  box-shadow:0 0 0 1px rgba(23,210,194,.45), 0 0 18px -2px rgba(23,210,194,.7);
  flex:none;
}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.brand-name em{font-style:normal;color:var(--ice)}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:9px 13px;
  font-size:14.5px;
  color:var(--muted);
  border-radius:9px;
  transition:color .2s var(--ease), background .2s var(--ease);
  white-space:nowrap;
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.045)}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:13px;right:13px;bottom:3px;
  height:2px;border-radius:2px;
  background:var(--ice);
  box-shadow:0 0 10px rgba(23,210,194,.85);
}

.header-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{
  display:none;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border-radius:10px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.search-box:focus-within{border-color:rgba(23,210,194,.65);box-shadow:0 0 0 3px rgba(23,210,194,.14)}
.search-box svg{width:15px;height:15px;color:var(--dim);flex:none}
.search-box input{
  width:132px;
  background:transparent;
  border:0;
  outline:none;
  color:var(--frost);
  font-size:14px;
  padding:5px 0;
}
.search-box input::placeholder{color:var(--dim)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border-radius:var(--r-btn);
  font-size:14.5px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .2s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease), color .22s var(--ease), filter .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(180deg,#FF8348 0%, #FF6A2B 100%);
  color:#0B0F12;
  box-shadow:var(--sh-glow);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.07);box-shadow:0 0 0 1px rgba(255,106,43,.6), 0 16px 38px -10px rgba(255,106,43,.7)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:rgba(255,255,255,.03);
  border-color:var(--line-strong);
  color:var(--text);
}
.btn-ghost:hover{border-color:rgba(23,210,194,.65);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  border-radius:11px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  color:var(--frost);
  cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.nav-toggle span::before,
.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;transition:transform .24s var(--ease)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

@media (min-width:1024px){
  .search-box{display:flex}
  .nav-toggle{display:none}
}
@media (max-width:1023px){
  .nav-links{
    position:fixed;
    top:64px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:12px 16px 22px;
    background:rgba(7,14,20,.97);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    transform:translateY(-10px);
    opacity:0;
    pointer-events:none;
    transition:opacity .24s var(--ease), transform .24s var(--ease);
    max-height:calc(100vh - 64px);
    overflow-y:auto;
  }
  .nav-links.open{opacity:1;transform:translateY(0);pointer-events:auto}
  .nav-links a{padding:13px 14px;border-left:2px solid transparent;border-radius:0;font-size:15.5px}
  .nav-links a.active{background:rgba(23,210,194,.07);border-left-color:var(--ice)}
  .nav-links a.active::after{display:none}
}
@media (max-width:520px){
  .brand-name{font-size:15px}
  .brand-mark{width:22px;height:22px}
  .header-inner{gap:10px}
  .btn{padding:0 14px;font-size:13.5px}
}

/* ---------- KV bar ---------- */
.kv-bar{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#0A151C 0%, #070E14 100%);
}
.kv-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  opacity:.3;
  transform:scale(1.02);
}
.kv-bar::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, rgba(7,14,20,.96) 0%, rgba(7,14,20,.78) 48%, rgba(7,14,20,.42) 100%);
  pointer-events:none;
}
.rink-ring{
  position:absolute;
  right:-90px;
  top:50%;
  width:340px;height:340px;
  transform:translateY(-50%);
  border-radius:50%;
  border:1px solid rgba(23,210,194,.22);
  box-shadow:inset 0 0 0 1px rgba(23,210,194,.08);
  pointer-events:none;
}
.rink-ring::after{
  content:"";
  position:absolute;
  inset:70px;
  border-radius:50%;
  border:1px dashed rgba(23,210,194,.16);
}
.kv-inner{position:relative;z-index:2;padding:34px 0 40px}
@media (min-width:1024px){ .kv-inner{padding:44px 0 52px} }

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--dim);margin-bottom:16px}
.breadcrumb a{color:var(--muted);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--ice)}
.breadcrumb .sep{color:rgba(255,255,255,.2)}
.breadcrumb .current{color:var(--dim)}

.kv-title{font-size:30px;line-height:1.15;font-weight:700;letter-spacing:-.01em;max-width:22ch}
@media (min-width:768px){ .kv-title{font-size:38px} }
@media (min-width:1024px){ .kv-title{font-size:44px} }
.kv-title span{color:var(--ice)}
.kv-sub{margin-top:14px;color:var(--muted);font-size:15.5px;max-width:56ch}
@media (min-width:768px){ .kv-sub{font-size:16.5px} }

.kv-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 13px;
  border-radius:999px;
  font-size:12.5px;
  letter-spacing:.02em;
  color:var(--ice);
  background:rgba(23,210,194,.1);
  border:1px solid rgba(23,210,194,.22);
}
.tag.warm{color:#FFB48C;background:rgba(255,106,43,.12);border-color:rgba(255,106,43,.28)}

.stat-strip{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  margin-top:28px;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--line);
  border:1px solid var(--line);
  max-width:720px;
}
@media (min-width:640px){ .stat-strip{grid-template-columns:repeat(3,1fr)} }
.stat-cell{background:rgba(14,26,34,.72);padding:16px 18px;backdrop-filter:blur(10px)}
.stat-cell b{display:block;font-size:22px;color:var(--frost);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.02em}
.stat-cell b i{font-style:normal;font-size:13px;color:var(--dim);margin-left:4px}
.stat-cell span{display:block;margin-top:4px;font-size:13px;color:var(--dim)}

/* ---------- Doc layout ---------- */
.doc-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  padding-top:56px;
}
@media (min-width:1024px){
  .doc-layout{grid-template-columns:280px minmax(0,1fr);gap:48px;padding-top:72px}
}

.toc{display:none}
@media (min-width:1024px){
  .toc{display:block}
  .toc-card{
    position:sticky;
    top:88px;
    padding:22px 20px;
    border-radius:var(--r-card);
    background:var(--glass);
    border:1px solid var(--line);
    backdrop-filter:blur(14px);
    box-shadow:var(--sh-card), inset 0 1px 0 rgba(255,255,255,.06);
  }
}
.toc-title{font-size:12.5px;letter-spacing:.14em;color:var(--dim);margin-bottom:14px}
.toc-link{
  display:block;
  position:relative;
  padding:9px 0 9px 14px;
  font-size:14.5px;
  color:var(--muted);
  border-left:2px solid rgba(255,255,255,.09);
  transition:color .2s var(--ease), border-color .2s var(--ease), padding-left .2s var(--ease);
}
.toc-link:hover{color:var(--text);border-left-color:rgba(23,210,194,.5)}
.toc-link.current{color:var(--ice);border-left-color:var(--ice);padding-left:18px}
.toc-foot{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--dim);line-height:1.85}

.content-col > * + *{margin-top:56px}
@media (min-width:1024px){ .content-col > * + *{margin-top:72px} }

.block-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:26px}
.block-head h2{font-size:23px;line-height:1.3;font-weight:700;letter-spacing:-.01em}
@media (min-width:768px){ .block-head h2{font-size:30px} }
.block-head h2::before{
  content:"";
  display:inline-block;
  width:4px;height:20px;
  margin-right:12px;
  border-radius:3px;
  background:linear-gradient(180deg,#17D2C2,#0E9E93);
  box-shadow:0 0 14px rgba(23,210,194,.7);
  vertical-align:-3px;
}
.block-head p{font-size:14.5px;color:var(--dim);max-width:60ch}

.grid-points{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){ .grid-points{grid-template-columns:repeat(2,1fr)} }
@media (min-width:1280px){ .grid-points{gap:24px} }

.point-card{
  position:relative;
  padding:24px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  box-shadow:var(--sh-card), inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}
.point-card:hover{transform:translateY(-3px);border-color:rgba(23,210,194,.3);box-shadow:0 24px 48px -26px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.08)}
.point-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:38px;height:26px;
  padding:0 10px;
  border-radius:999px;
  font-size:12.5px;
  color:var(--ice);
  background:rgba(23,210,194,.1);
  border:1px solid rgba(23,210,194,.24);
}
.point-card h3{margin-top:16px;font-size:19px;font-weight:600}
.point-card p{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.85}

/* ---------- Steps ---------- */
.steps-wrap{
  padding:26px;
  border-radius:var(--r-lg);
  background:linear-gradient(180deg, rgba(20,34,44,.62), rgba(14,26,34,.5));
  border:1px solid var(--line);
  box-shadow:var(--sh-card), inset 0 1px 0 rgba(255,255,255,.06);
}
@media (min-width:768px){ .steps-wrap{padding:34px} }
.figure-box{
  position:relative;
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line);
  margin-bottom:30px;
  aspect-ratio:16/9;
  background:var(--bg-2);
}
.figure-box img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.figure-box:hover img{transform:scale(1.04)}
.figure-box figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;
  font-size:13px;
  color:var(--muted);
  background:linear-gradient(180deg, rgba(7,14,20,0), rgba(7,14,20,.88));
}

.steps{position:relative}
.step{position:relative;padding:0 0 30px 66px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";
  position:absolute;
  left:23px;top:50px;bottom:0;
  width:2px;
  background:linear-gradient(180deg, rgba(23,210,194,.55), rgba(23,210,194,0));
}
.step:last-child::before{display:none}
.step-num{
  position:absolute;left:0;top:0;
  width:48px;height:48px;
  border-radius:50%;
  display:grid;place-items:center;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:16px;font-weight:700;
  color:#08151B;
  background:radial-gradient(circle at 32% 28%, #EAF4F7 0%, #17D2C2 55%, #0E9E93 100%);
  box-shadow:0 0 0 1px rgba(23,210,194,.45), 0 10px 24px -12px rgba(23,210,194,.9);
}
.step h3{font-size:18px;font-weight:600;padding-top:11px}
.step p{margin-top:8px;font-size:15px;color:var(--muted);line-height:1.85}
.step .step-note{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:12px;
  padding:5px 12px;
  border-radius:999px;
  font-size:12.5px;
  color:var(--mist);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
}

/* ---------- Table ---------- */
.table-shell{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:rgba(14,26,34,.55);
  box-shadow:var(--sh-card);
}
.rule-table{width:100%;border-collapse:collapse;font-size:14.5px}
.rule-table thead th{
  text-align:left;
  padding:15px 18px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--frost);
  background:rgba(23,210,194,.09);
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.rule-table tbody td{
  padding:17px 18px;
  color:var(--muted);
  border-bottom:1px solid rgba(255,255,255,.055);
  vertical-align:top;
  line-height:1.75;
}
.rule-table tbody tr:nth-child(odd){background:rgba(255,255,255,.022)}
.rule-table tbody tr:hover{background:rgba(23,210,194,.06)}
.rule-table tbody tr:last-child td{border-bottom:0}
.rule-table td b{color:var(--frost);font-weight:600}
.rule-table .tier{
  display:inline-block;
  padding:3px 11px;
  border-radius:999px;
  font-size:12.5px;
  color:#FFB48C;
  background:rgba(255,106,43,.12);
  border:1px solid rgba(255,106,43,.26);
  white-space:nowrap;
}
.rule-table .tier.cool{color:var(--ice);background:rgba(23,210,194,.1);border-color:rgba(23,210,194,.24)}

@media (max-width:760px){
  .table-shell{border:0;background:transparent;box-shadow:none}
  .rule-table, .rule-table tbody, .rule-table tr, .rule-table td{display:block;width:100%}
  .rule-table thead{display:none}
  .rule-table tbody tr{
    background:var(--glass);
    border:1px solid var(--line);
    border-radius:14px;
    padding:6px 16px;
    margin-bottom:14px;
    box-shadow:var(--sh-card), inset 0 1px 0 rgba(255,255,255,.06);
  }
  .rule-table tbody tr:nth-child(odd){background:var(--glass)}
  .rule-table tbody tr:hover{background:var(--glass)}
  .rule-table tbody td{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:18px;
    padding:10px 0;
    border-bottom:1px dashed rgba(255,255,255,.07);
    font-size:14.5px;
    text-align:right;
  }
  .rule-table tbody tr td:last-child{border-bottom:0}
  .rule-table tbody td::before{
    content:attr(data-label);
    flex:none;
    color:var(--dim);
    font-size:13px;
    text-align:left;
  }
}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;display:flex;flex-direction:column;gap:12px}
.faq-item{
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(20,34,44,.5);
  backdrop-filter:blur(12px);
  overflow:hidden;
  transition:border-color .22s var(--ease), background .22s var(--ease);
}
.faq-item:hover{border-color:rgba(23,210,194,.28)}
.faq-item[open]{background:rgba(14,26,34,.8);border-color:rgba(23,210,194,.3)}
.faq-item summary{
  position:relative;
  list-style:none;
  cursor:pointer;
  padding:18px 56px 18px 20px;
  font-size:16px;
  font-weight:600;
  color:var(--frost);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";
  position:absolute;
  right:20px;top:50%;
  width:14px;height:14px;
  transform:translateY(-50%);
  background:
    linear-gradient(var(--ice),var(--ice)) center / 14px 2px no-repeat,
    linear-gradient(var(--ice),var(--ice)) center / 2px 14px no-repeat;
  transition:transform .26s var(--ease), opacity .26s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-body{padding:0 20px 20px;font-size:15px;color:var(--muted);line-height:1.9;border-top:1px solid rgba(255,255,255,.06);padding-top:16px}
.faq-body p + p{margin-top:10px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid rgba(23,210,194,.2);
  background:linear-gradient(120deg, rgba(14,26,34,.95) 0%, rgba(20,34,44,.8) 55%, rgba(23,210,194,.12) 100%);
  box-shadow:var(--sh-card), inset 0 1px 0 rgba(255,255,255,.07);
  padding:30px 24px;
}
@media (min-width:768px){ .cta-band{padding:42px 40px} }
.cta-band::before{
  content:"";
  position:absolute;
  right:-120px;top:-120px;
  width:320px;height:320px;
  border-radius:50%;
  border:1px solid rgba(23,210,194,.16);
  pointer-events:none;
}
.cta-inner{position:relative;display:flex;flex-direction:column;gap:22px}
@media (min-width:900px){ .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:40px} }
.cta-inner h2{font-size:23px;font-weight:700;line-height:1.35;letter-spacing:-.01em}
@media (min-width:768px){ .cta-inner h2{font-size:28px} }
.cta-inner p{margin-top:10px;color:var(--muted);font-size:15px;max-width:54ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:none}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:72px;
  background:linear-gradient(180deg, rgba(14,26,34,.72), rgba(7,14,20,1));
  border-top:1px solid var(--line);
  padding-top:60px;
}
@media (min-width:1024px){ .site-footer{margin-top:96px;padding-top:72px} }
.foot-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){ .foot-grid{grid-template-columns:repeat(2,1fr)} }
@media (min-width:1024px){ .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:44px} }
.site-footer .brand{margin-bottom:14px}
.foot-title{font-size:12.5px;letter-spacing:.14em;color:var(--dim);margin-bottom:14px}
.foot-list a{
  display:block;
  padding:6px 0;
  font-size:14.5px;
  color:var(--muted);
  transition:color .2s var(--ease), transform .2s var(--ease);
}
.foot-list a:hover{color:var(--ice);transform:translateX(3px)}
.foot-note{font-size:13.5px;color:var(--dim);line-height:1.9;max-width:34ch}
.foot-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  margin-top:52px;
  padding:22px 0 26px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--dim);
}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;
  right:18px;bottom:22px;
  z-index:70;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(20,34,44,.72);
  backdrop-filter:blur(12px);
  color:var(--frost);
  cursor:pointer;
  opacity:0;
  transform:translateY(10px);
  pointer-events:none;
  transition:opacity .26s var(--ease), transform .26s var(--ease), border-color .22s var(--ease);
}
.to-top.show{opacity:1;transform:translateY(0);pointer-events:auto}
.to-top:hover{border-color:rgba(23,210,194,.6)}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}